diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 5d52b8f5c..f4ebf82c0 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -15,10 +15,12 @@ jobs:
   tests:
     name: Integration and Unit tests
     runs-on: ubuntu-latest
+    env:
+      NO_COVERAGE: true
     strategy:
       fail-fast: true
       matrix:
-        ruby: [2.5.8, 2.6.6, 2.7.1]
+        ruby: [ 3.0.6, 3.1.4, 3.2.3 ]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
@@ -89,7 +91,7 @@ jobs:
   all-tests:
     name: Tests
     runs-on: ubuntu-latest
-    needs: [tests, acceptance-tests]
+    needs: [ tests, acceptance-tests ]
     steps:
       - name: Tests summary
         run: echo -e "\033[38;2;95;215;0m\033[1mAll tests successfully passed"
\ No newline at end of file
diff --git a/.pubnub.yml b/.pubnub.yml
index fcad66dd5..d3a0c87a4 100644
--- a/.pubnub.yml
+++ b/.pubnub.yml
@@ -1,6 +1,11 @@
 ---
-version: "5.3.2"
+version: "5.3.3"
 changelog:
+  - date: 2024-01-29
+    version: v5.3.3
+    changes:
+      - type: improvement
+        text: "Bump required version to the minimum officially supported Ruby version."
   - date: 2023-11-23
     version: v5.3.2
     changes:
@@ -74,389 +79,276 @@ changelog:
     changes:
       - type: feature
         text: "Grant_token allows generation of signed token with permissions for channels, channel groups and uuids."
-  -
-    changes:
-      -
-        text: "Add new `sdks` section to `.pubnub.yml` with information about available artifacts and distribution variants."
+  - changes:
+      - text: "Add new `sdks` section to `.pubnub.yml` with information about available artifacts and distribution variants."
         type: improvement
     date: 2021-06-09
     version: v4.6.2
-  -
-    changes:
-      -
-        text: "Exclude `spec` and `fixtures` from built gem file."
+  - changes:
+      - text: "Exclude `spec` and `fixtures` from built gem file."
         type: improvement
-      -
-        text: "Fix Ruby SDK repository location under `sdks` section in `.pubnub.yml`."
+      - text: "Fix Ruby SDK repository location under `sdks` section in `.pubnub.yml`."
         type: improvement
-      -
-        text: "Add new section to `.pubnub.yml` file with information about SDK and destribution types."
+      - text: "Add new section to `.pubnub.yml` file with information about SDK and destribution types."
         type: improvement
     date: 2021-05-19
     version: v4.6.1
-  -
-    changes:
-      -
-        text: "BREAKING CHANGE: Add randomized initialization vector usage by default for data encryption / decryption in publish / subscribe / history API calls."
+  - changes:
+      - text: "BREAKING CHANGE: Add randomized initialization vector usage by default for data encryption / decryption in publish / subscribe / history API calls."
         type: feature
-      -
-        text: "Fix issue which caused Object request body encryption when `cipher_key` is set."
+      - text: "Fix issue which caused Object request body encryption when `cipher_key` is set."
         type: bug
     date: 2021-03-08
     version: v4.6.0
-  -
-    changes:
-      -
-        text: "Add support for APNS2 device/channel management."
+  - changes:
+      - text: "Add support for APNS2 device/channel management."
         type: feature
-      -
-        text: "Resolved issue with multiple timetokens in message counts endpoint"
+      - text: "Resolved issue with multiple timetokens in message counts endpoint"
         type: bug
     date: 2020-12-03
     version: v4.5.0
-  -
-    changes:
-      -
-        text: "Add simplified Objects API support with UUID and Channel metadata / membership management."
+  - changes:
+      - text: "Add simplified Objects API support with UUID and Channel metadata / membership management."
         type: feature
-      -
-        text: "Add uuid and parameter to Grant API along with new Objects permissions: `get`, `update` and `join`."
+      - text: "Add uuid and parameter to Grant API along with new Objects permissions: `get`, `update` and `join`."
         type: feature
     date: 2020-10-21
     version: v4.4.0
-  -
-    changes:
-      -
-        text: "Add `delete` permission for `channel` to Grant."
+  - changes:
+      - text: "Add `delete` permission for `channel` to Grant."
         type: feature
     date: 2020-10-18
     version: v4.3.0
-  -
-    changes:
-      -
-        text: "Don't suppress runtime errors."
+  - changes:
+      - text: "Don't suppress runtime errors."
         type: bug
     date: 2020-09-14
     version: v4.2.7
-  -
-    changes:
-      -
-        text: "History can now respond with message meta information."
+  - changes:
+      - text: "History can now respond with message meta information."
         type: feature
-      -
-        text: "Added official support for Ruby 2.7.X"
+      - text: "Added official support for Ruby 2.7.X"
         type: feature
-      -
-        text: "History properly decrypts messages when using the \"include_token\" parameter."
+      - text: "History properly decrypts messages when using the \"include_token\" parameter."
         type: bug
     date: 2020-08-25
     version: v4.2.6
-  -
-    changes:
-      -
-        text: "Fixed Message Counts channel timetokens by disabling alphabetic sorting of the channels list."
+  - changes:
+      - text: "Fixed Message Counts channel timetokens by disabling alphabetic sorting of the channels list."
         type: bug
     date: 2020-06-02
     version: v4.2.5
-  -
-    changes:
-      -
-        text: "Replace event name with full endpoint path in PAM signatures, for compatibility with PAM v2 signatures."
+  - changes:
+      - text: "Replace event name with full endpoint path in PAM signatures, for compatibility with PAM v2 signatures."
         type: bug
-      -
-        text: "Change paths for PAM endpoints from v1 to v2."
+      - text: "Change paths for PAM endpoints from v1 to v2."
         type: bug
-      -
-        text: "Update PAM signature generator to correctly sort the query string parameters based on key instead of combined key and value."
+      - text: "Update PAM signature generator to correctly sort the query string parameters based on key instead of combined key and value."
         type: bug
     date: 2020-05-22
     version: v4.2.4
-  -
-    changes:
-      -
-        text: "Resolved issue with multiple timetokens in message counts endpoint"
+  - changes:
+      - text: "Resolved issue with multiple timetokens in message counts endpoint"
         type: bug
     date: 2019-11-11
     version: "4.2.2"
-  -
-    changes:
-      -
-        text: "Updated listener methods"
+  - changes:
+      - text: "Updated listener methods"
         type: feature
     date: 2019-10-25
     version: "4.2.1"
-  -
-    changes:
-      -
-        text: "Added objects feature"
+  - changes:
+      - text: "Added objects feature"
         type: feature
     date: 2019-10-11
     version: "4.2.0"
-  -
-    changes:
-      -
-        text: "Added signal feature"
+  - changes:
+      - text: "Added signal feature"
         type: feature
     date: 2019-08-21
     version: "4.1.6"
-  -
-    changes:
-      -
-        text: "Updated dependencies"
+  - changes:
+      - text: "Updated dependencies"
         type: improvement
     date: 2019-07-29
     version: "4.1.5"
-  -
-    changes:
-      -
-        text: "Added push API"
+  - changes:
+      - text: "Added push API"
         type: feature
     date: 2019-04-08
     version: "4.1.1"
-  -
-    changes:
-      -
-        text: "Added 'message_count' API endpoint"
+  - changes:
+      - text: "Added 'message_count' API endpoint"
         type: feature
     date: 2019-02-28
     version: "4.1.0"
-  -
-    changes:
-      -
-        text: "Switch from Celluloid to concurrent-ruby."
+  - changes:
+      - text: "Switch from Celluloid to concurrent-ruby."
         type: bug
     date: 2018-08-28
     version: "4.0.28"
-  -
-    changes:
-      -
-        text: "Fixed telemetry issues."
+  - changes:
+      - text: "Fixed telemetry issues."
         type: bug
     date: 2017-11-17
     version: "4.0.27"
-  -
-    changes:
-      -
-        text: "Secured telemetry call. Fixed crash when an app was exiting."
+  - changes:
+      - text: "Secured telemetry call. Fixed crash when an app was exiting."
         type: bug
     date: 2017-10-23
     version: "4.0.26"
-  -
-    changes:
-      -
-        text: "Added telemetry"
+  - changes:
+      - text: "Added telemetry"
         type: feature
     date: 2017-09-12
     version: "4.0.25"
-  -
-    changes:
-      -
-        text: "Added #delete_messages method"
+  - changes:
+      - text: "Added #delete_messages method"
         type: feature
-      -
-        text: "Improved timeout error handling (thanks @f1sherman)"
+      - text: "Improved timeout error handling (thanks @f1sherman)"
         type: improvement
     date: 2017-08-29
     version: "4.0.24"
-  -
-    changes:
-      -
-        text: "Fixed HereNow envelope generation"
+  - changes:
+      - text: "Fixed HereNow envelope generation"
         type: bug
     date: 2017-07-26
     version: "4.0.23"
-  -
-    changes:
-      -
-        text: "Fixed signature generation and channel name escaping"
+  - changes:
+      - text: "Fixed signature generation and channel name escaping"
         type: bug
     date: 2017-05-31
     version: "4.0.22"
-  -
-    changes:
-      -
-        text: "Fixed signature generation"
+  - changes:
+      - text: "Fixed signature generation"
         type: bug
     date: 2017-04-18
     version: "4.0.21"
-  -
-    changes:
-      -
-        text: "origin can now be set in initialized client"
+  - changes:
+      - text: "origin can now be set in initialized client"
         type: improvement
-      -
-        text: "presence interval support"
+      - text: "presence interval support"
         type: improvement
-      -
-        text: "allows using multiple cipher keys"
+      - text: "allows using multiple cipher keys"
         type: improvement
     date: 2017-04-11
     version: "4.0.20"
-  -
-    changes:
-      -
-        text: "Fixed sync subscribe not terminating actors"
+  - changes:
+      - text: "Fixed sync subscribe not terminating actors"
         type: bug
     date: 2017-03-02
     version: v4.0.18
-  -
-    changes:
-      -
-        text: "Added a bit more debug logging"
+  - changes:
+      - text: "Added a bit more debug logging"
         type: improvement
-      -
-        text: "Updated default origin"
+      - text: "Updated default origin"
         type: improvement
     date: 2016-12-21
     version: v4.0.17
-  -
-    changes:
-      -
-        text: "Fixed missing channel group parameter in leave event"
+  - changes:
+      - text: "Fixed missing channel group parameter in leave event"
         type: bug
     date: 2016-11-23
     version: v4.0.16
-  -
-    changes:
-      -
-        text: "Fixed PAM signature when some special characters are present"
+  - changes:
+      - text: "Fixed PAM signature when some special characters are present"
         type: bug
     date: 2016-11-21
     version: v4.0.15
-  -
-    changes:
-      -
-        text: "Added ttl parameter for publish"
+  - changes:
+      - text: "Added ttl parameter for publish"
         type: improvement
     date: 2016-11-04
     version: v4.0.14
-  -
-    changes:
-      -
-        text: "Changed init message log level to debug"
+  - changes:
+      - text: "Changed init message log level to debug"
         type: improvement
     date: 2016-11-04
     version: v4.0.13
-  -
-    changes:
-      -
-        text: "Added alert on catchup failure (REQUEST_MESSAGE_COUNT_EXCEEDED)"
+  - changes:
+      - text: "Added alert on catchup failure (REQUEST_MESSAGE_COUNT_EXCEEDED)"
         type: improvement
     date: 2016-10-31
     version: v4.0.12
-  -
-    changes:
-      -
-        text: "Added super admin mode (Enabled when secret key is set on Pubnub::Client init)"
+  - changes:
+      - text: "Added super admin mode (Enabled when secret key is set on Pubnub::Client init)"
         type: improvement
     date: 2016-10-31
     version: v4.0.11
-  -
-    changes:
-      -
-        text: "Better single events timeout handling"
+  - changes:
+      - text: "Better single events timeout handling"
         type: improvement
-      -
-        text: "DRYed envelope formatting a bit"
+      - text: "DRYed envelope formatting a bit"
         type: improvement
     date: 2016-10-31
     version: v4.0.10
-  -
-    changes:
-      -
-        text: "Removed json dependency"
+  - changes:
+      - text: "Removed json dependency"
         type: improvement
-      -
-        text: "Updated dependecies"
+      - text: "Updated dependecies"
         type: improvement
     date: 2016-10-31
     version: v4.0.9
-  -
-    changes:
-      -
-        text: "Updated dry-validation."
+  - changes:
+      - text: "Updated dry-validation."
         type: improvement
-      -
-        text: "Dropped support for ruby 2.0."
+      - text: "Dropped support for ruby 2.0."
         type: improvement
     date: 2016-10-31
     version: v4.0.8
-  -
-    changes:
-      -
-        text: "Added message decrypting in history."
+  - changes:
+      - text: "Added message decrypting in history."
         type: improvement
     date: 2016-08-23
     version: v4.0.7
-  -
-    changes:
-      -
-        text: "channel and channels are the same argument."
+  - changes:
+      - text: "channel and channels are the same argument."
         type: improvement
-      -
-        text: "channel_group and channel_groups are the same argument."
+      - text: "channel_group and channel_groups are the same argument."
         type: improvement
-      -
-        text: "added `with_presence` flag for subscribe, default false."
+      - text: "added `with_presence` flag for subscribe, default false."
         type: improvement
     date: 2016-08-17
     version: v4.0.6
-  -
-    changes:
-      -
-        text: "Required CGI."
+  - changes:
+      - text: "Required CGI."
         type: improvement
     date: 2016-08-17
     version: v4.0.5
-  -
-    changes:
-      -
-        text: "Added #subscribe_filter for client"
+  - changes:
+      - text: "Added #subscribe_filter for client"
         type: feature
     date: 2016-08-17
     version: v4.0.2
-  -
-    changes:
-      -
-        text: "Updated dry-validation and EnvelopeSchema."
+  - changes:
+      - text: "Updated dry-validation and EnvelopeSchema."
         type: improvement
     date: 2016-08-17
     version: v4.0.1
-  -
-    changes:
-      -
-        text: "Removed auth_key and uuid setters (#set_auth_key,"
+  - changes:
+      - text: "Removed auth_key and uuid setters (#set_auth_key,"
         type: feature
-      -
-        text: Added
+      - text: Added
         type: improvement
     date: 2016-08-17
     version: v4.0.0
-  -
-    changes:
-      -
-        text: "Restored auth_key and uuid setters. Important notice: they will be removed"
+  - changes:
+      - text: "Restored auth_key and uuid setters. Important notice: they will be removed"
         type: improvement
     date: 2016-08-17
     version: v3.8.3
-  -
-    changes:
-      -
-        text: "Added :include_token parameter to history call."
+  - changes:
+      - text: "Added :include_token parameter to history call."
         type: feature
     date: 2016-08-17
     version: v3.8.2
-  -
-    changes:
-      -
-        text: "Updated celluloid dependency."
+  - changes:
+      - text: "Updated celluloid dependency."
         type: improvement
     date: 2016-08-17
     version: v3.8.1
-  -
-    changes:
-      -
-        text: "Release of celluloid version of pubnub gem. It's complete rewrite but public API doesn't change."
+  - changes:
+      - text: "Release of celluloid version of pubnub gem. It's complete rewrite but public API doesn't change."
         type: improvement
     date: 2017-08-17
     version: v3.8.0
@@ -548,11 +440,10 @@ name: ruby
 schema: 1
 scm: github.com/pubnub/ruby
 supported-platforms:
-  -
-    editors:
-      - "ruby 2.6"
-      - "ruby 2.5"
-      - "ruby 2.4"
+  - editors:
+      - "ruby 3.2"
+      - "ruby 3.1"
+      - "ruby 3.0"
     platforms:
       - "FreeBSD 8-STABLE or later, amd64, 386"
       - "Linux 2.6 or later, amd64, 386"
@@ -580,7 +471,7 @@ sdks:
             requires:
               - name: addressable
                 min-version: 2.0.0
-                max-version: 2.7.0
+                max-version: 2.8.6
                 location: https://rubygems.org/gems/addressable
                 license: Apache License 2.0
                 license-url: https://github.com/sporkmonger/addressable/blob/main/LICENSE.txt
@@ -588,7 +479,7 @@ sdks:
                 notes: Will be installed along with SDK
               - name: concurrent-ruby
                 min-version: 1.1.5
-                max-version: 1.1.6
+                max-version: 1.1.10
                 location: https://rubygems.org/gems/concurrent-ruby
                 license: MIT License
                 license-url: https://github.com/ruby-concurrency/concurrent-ruby/blob/master/LICENSE.txt
@@ -604,7 +495,7 @@ sdks:
                 notes: Will be installed along with SDK
               - name: dry-validation
                 min-version: 1.0.0
-                max-version: 1.5.3
+                max-version: 1.10.0
                 location: https://rubygems.org/gems/dry-validation
                 license: MIT License
                 license-url: https://github.com/dry-rb/dry-validation/blob/master/LICENSE
@@ -620,7 +511,7 @@ sdks:
                 notes: Will be installed along with SDK
               - name: json
                 min-version: 2.2.0
-                max-version: 2.3.1
+                max-version: 2.7.1
                 location: https://rubygems.org/gems/json
                 license: Ruby License
                 license-url: https://github.com/flori/json/blob/master/LICENSE
@@ -628,7 +519,7 @@ sdks:
                 notes: Will be installed along with SDK
               - name: timers
                 min-version: 4.3.0
-                max-version: 4.3.0
+                max-version: 4.3.5
                 location: https://rubygems.org/gems/timers
                 license: MIT License
                 license-url: https://github.com/socketry/timers#license
@@ -638,10 +529,10 @@ sdks:
               supported-operating-systems:
                 macOS:
                   runtime-version:
-                    - Ruby 2.4.x
-                    - Ruby 2.5.x
-                    - Ruby 2.6.x
-                    - Ruby 2.7.x
+                    - Ruby 3.0.x
+                    - Ruby 3.1.x
+                    - Ruby 3.2.x
+                    - Ruby 3.3.x
                   minimum-os-version:
                     - OS X 10.10
                   maximum-os-version:
@@ -651,10 +542,10 @@ sdks:
                     - x86-64
                 Windows:
                   runtime-version:
-                    - Ruby 2.4.x
-                    - Ruby 2.5.x
-                    - Ruby 2.6.x
-                    - Ruby 2.7.x
+                    - Ruby 3.0.x
+                    - Ruby 3.1.x
+                    - Ruby 3.2.x
+                    - Ruby 3.3.x
                   minimum-os-version:
                     - Windows 7 Professional
                     - Windows 7 Enterprise
@@ -667,10 +558,10 @@ sdks:
                     - x86-64
                 Linux:
                   runtime-version:
-                    - Ruby 2.4.x
-                    - Ruby 2.5.x
-                    - Ruby 2.6.x
-                    - Ruby 2.7.x
+                    - Ruby 3.0.x
+                    - Ruby 3.1.x
+                    - Ruby 3.2.x
+                    - Ruby 3.3.x
                   minimum-os-version:
                     - Ubuntu 16.04 LTS
                   maximum-os-version:
@@ -680,12 +571,12 @@ sdks:
                     - x86-64
           - distribution-type: package
             distribution-repository: RubyGems
-            package-name: pubnub-5.3.2.gem
+            package-name: pubnub-5.3.3.gem
             location: https://rubygems.org/gems/pubnub
             requires:
               - name: addressable
                 min-version: 2.0.0
-                max-version: 2.7.0
+                max-version: 2.8.6
                 location: https://rubygems.org/gems/addressable
                 license: Apache License 2.0
                 license-url: https://github.com/sporkmonger/addressable/blob/main/LICENSE.txt
@@ -693,7 +584,7 @@ sdks:
                 notes: Will be installed along with SDK
               - name: concurrent-ruby
                 min-version: 1.1.5
-                max-version: 1.1.6
+                max-version: 1.1.10
                 location: https://rubygems.org/gems/concurrent-ruby
                 license: MIT License
                 license-url: https://github.com/ruby-concurrency/concurrent-ruby/blob/master/LICENSE.txt
@@ -709,7 +600,7 @@ sdks:
                 notes: Will be installed along with SDK
               - name: dry-validation
                 min-version: 1.0.0
-                max-version: 1.5.3
+                max-version: 1.10.0
                 location: https://rubygems.org/gems/dry-validation
                 license: MIT License
                 license-url: https://github.com/dry-rb/dry-validation/blob/master/LICENSE
@@ -725,7 +616,7 @@ sdks:
                 notes: Will be installed along with SDK
               - name: json
                 min-version: 2.2.0
-                max-version: 2.3.1
+                max-version: 2.7.1
                 location: https://rubygems.org/gems/json
                 license: Ruby License
                 license-url: https://github.com/flori/json/blob/master/LICENSE
@@ -733,7 +624,7 @@ sdks:
                 notes: Will be installed along with SDK
               - name: timers
                 min-version: 4.3.0
-                max-version: 4.3.0
+                max-version: 4.3.5
                 location: https://rubygems.org/gems/timers
                 license: MIT License
                 license-url: https://github.com/socketry/timers#license
@@ -743,10 +634,10 @@ sdks:
               supported-operating-systems:
                 macOS:
                   runtime-version:
-                    - Ruby 2.4.x
-                    - Ruby 2.5.x
-                    - Ruby 2.6.x
-                    - Ruby 2.7.x
+                    - Ruby 3.0.x
+                    - Ruby 3.1.x
+                    - Ruby 3.2.x
+                    - Ruby 3.3.x
                   minimum-os-version:
                     - OS X 10.10
                   maximum-os-version:
@@ -756,10 +647,10 @@ sdks:
                     - x86-64
                 Windows:
                   runtime-version:
-                    - Ruby 2.4.x
-                    - Ruby 2.5.x
-                    - Ruby 2.6.x
-                    - Ruby 2.7.x
+                    - Ruby 3.0.x
+                    - Ruby 3.1.x
+                    - Ruby 3.2.x
+                    - Ruby 3.3.x
                   minimum-os-version:
                     - Windows 7 Professional
                     - Windows 7 Enterprise
@@ -772,10 +663,10 @@ sdks:
                     - x86-64
                 Linux:
                   runtime-version:
-                    - Ruby 2.4.x
-                    - Ruby 2.5.x
-                    - Ruby 2.6.x
-                    - Ruby 2.7.x
+                    - Ruby 3.0.x
+                    - Ruby 3.1.x
+                    - Ruby 3.2.x
+                    - Ruby 3.3.x
                   minimum-os-version:
                     - Ubuntu 16.04 LTS
                   maximum-os-version:
@@ -785,19 +676,19 @@ sdks:
                     - x86-64
           - distribution-type: library
             distribution-repository: GitHub release
-            package-name: pubnub-5.3.2.gem
-            location: https://github.com/pubnub/ruby/releases/download/v5.3.2/pubnub-5.3.2.gem
+            package-name: pubnub-5.3.3.gem
+            location: https://github.com/pubnub/ruby/releases/download/v5.3.3/pubnub-5.3.3.gem
             requires:
               - name: addressable
                 min-version: 2.0.0
-                max-version: 2.7.0
+                max-version: 2.8.6
                 location: https://rubygems.org/gems/addressable
                 license: Apache License 2.0
                 license-url: https://github.com/sporkmonger/addressable/blob/main/LICENSE.txt
                 is-required: Required
               - name: concurrent-ruby
                 min-version: 1.1.5
-                max-version: 1.1.6
+                max-version: 1.1.10
                 location: https://rubygems.org/gems/concurrent-ruby
                 license: MIT License
                 license-url: https://github.com/ruby-concurrency/concurrent-ruby/blob/master/LICENSE.txt
@@ -811,7 +702,7 @@ sdks:
                 is-required: Required
               - name: dry-validation
                 min-version: 1.0.0
-                max-version: 1.5.3
+                max-version: 1.10.0
                 location: https://rubygems.org/gems/dry-validation
                 license: MIT License
                 license-url: https://github.com/dry-rb/dry-validation/blob/master/LICENSE
@@ -825,14 +716,14 @@ sdks:
                 is-required: Required
               - name: json
                 min-version: 2.2.0
-                max-version: 2.3.1
+                max-version: 2.7.1
                 location: https://rubygems.org/gems/json
                 license: Ruby License
                 license-url: https://github.com/flori/json/blob/master/LICENSE
                 is-required: Required
               - name: timers
                 min-version: 4.3.0
-                max-version: 4.3.0
+                max-version: 4.3.5
                 location: https://rubygems.org/gems/timers
                 license: MIT License
                 license-url: https://github.com/socketry/timers#license
@@ -841,10 +732,10 @@ sdks:
               supported-operating-systems:
                 macOS:
                   runtime-version:
-                    - Ruby 2.4.x
-                    - Ruby 2.5.x
-                    - Ruby 2.6.x
-                    - Ruby 2.7.x
+                    - Ruby 3.0.x
+                    - Ruby 3.1.x
+                    - Ruby 3.2.x
+                    - Ruby 3.3.x
                   minimum-os-version:
                     - OS X 10.10
                   maximum-os-version:
@@ -854,10 +745,10 @@ sdks:
                     - x86-64
                 Windows:
                   runtime-version:
-                    - Ruby 2.4.x
-                    - Ruby 2.5.x
-                    - Ruby 2.6.x
-                    - Ruby 2.7.x
+                    - Ruby 3.0.x
+                    - Ruby 3.1.x
+                    - Ruby 3.2.x
+                    - Ruby 3.3.x
                   minimum-os-version:
                     - Windows 7 Professional
                     - Windows 7 Enterprise
@@ -870,10 +761,10 @@ sdks:
                     - x86-64
                 Linux:
                   runtime-version:
-                    - Ruby 2.4.x
-                    - Ruby 2.5.x
-                    - Ruby 2.6.x
-                    - Ruby 2.7.x
+                    - Ruby 3.0.x
+                    - Ruby 3.1.x
+                    - Ruby 3.2.x
+                    - Ruby 3.3.x
                   minimum-os-version:
                     - Ubuntu 16.04 LTS
                   maximum-os-version:
diff --git a/.rubocop.yml b/.rubocop.yml
index 68bda631d..3a72db1b1 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,5 +1,5 @@
 AllCops:
-  TargetRubyVersion: 2.4
+  TargetRubyVersion: 3.0
   Exclude:
     - 'spec/**/*'
     - 'examples/**/*'
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4d1757888..000b3e16c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## v5.3.3
+January 29 2024
+
+#### Modified
+- Bump required version to the minimum officially supported Ruby version.
+
 ## v5.3.2
 November 23 2023
 
diff --git a/Gemfile.lock b/Gemfile.lock
index cdffd7857..1bcc6f03c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    pubnub (5.3.2)
+    pubnub (5.3.3)
       addressable (>= 2.0.0)
       concurrent-ruby (~> 1.1.5)
       concurrent-ruby-edge (~> 0.5.0)
@@ -13,174 +13,157 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
-    ast (2.4.1)
-    awesome_print (1.8.0)
-    binding_of_caller (0.8.0)
+    addressable (2.8.6)
+      public_suffix (>= 2.0.2, < 6.0)
+    ast (2.4.2)
+    awesome_print (1.9.2)
+    bigdecimal (3.1.6)
+    binding_of_caller (1.0.0)
       debug_inspector (>= 0.0.1)
     builder (3.2.4)
     codacy-coverage (2.2.1)
       simplecov
     coderay (1.1.3)
-    concurrent-ruby (1.1.6)
+    concurrent-ruby (1.1.10)
     concurrent-ruby-edge (0.5.0)
       concurrent-ruby (~> 1.1.5)
-    crack (0.4.3)
-      safe_yaml (~> 1.0.0)
-    cucumber (7.0.0)
+    crack (0.4.5)
+      rexml
+    cucumber (9.1.2)
       builder (~> 3.2, >= 3.2.4)
-      cucumber-core (~> 10.0, >= 10.0.1)
-      cucumber-create-meta (~> 6.0, >= 6.0.1)
-      cucumber-cucumber-expressions (~> 12.1, >= 12.1.1)
-      cucumber-gherkin (~> 20.0, >= 20.0.1)
-      cucumber-html-formatter (~> 16.0, >= 16.0.1)
-      cucumber-messages (~> 17.0, >= 17.0.1)
-      cucumber-wire (~> 6.0, >= 6.0.1)
-      diff-lcs (~> 1.4, >= 1.4.4)
-      mime-types (~> 3.3, >= 3.3.1)
-      multi_test (~> 0.1, >= 0.1.2)
-      sys-uname (~> 1.2, >= 1.2.2)
-    cucumber-core (10.0.1)
-      cucumber-gherkin (~> 20.0, >= 20.0.1)
-      cucumber-messages (~> 17.0, >= 17.0.1)
-      cucumber-tag-expressions (~> 3.0, >= 3.0.1)
-    cucumber-create-meta (6.0.1)
-      cucumber-messages (~> 17.0, >= 17.0.1)
-      sys-uname (~> 1.2, >= 1.2.2)
-    cucumber-cucumber-expressions (12.1.3)
-    cucumber-gherkin (20.0.1)
-      cucumber-messages (~> 17.0, >= 17.0.1)
-    cucumber-html-formatter (16.0.1)
-      cucumber-messages (~> 17.0, >= 17.0.1)
-    cucumber-messages (17.1.1)
-    cucumber-tag-expressions (3.0.1)
-    cucumber-wire (6.1.1)
-      cucumber-core (~> 10.0, >= 10.0.1)
-      cucumber-cucumber-expressions (~> 12.1, >= 12.1.2)
-      cucumber-messages (~> 17.0, >= 17.0.1)
-    debug_inspector (0.0.3)
-    diff-lcs (1.4.4)
+      cucumber-ci-environment (~> 9.2, >= 9.2.0)
+      cucumber-core (~> 12.0)
+      cucumber-cucumber-expressions (~> 17.0)
+      cucumber-gherkin (> 24, < 27)
+      cucumber-html-formatter (> 20.3, < 22)
+      cucumber-messages (> 19, < 25)
+      diff-lcs (~> 1.5)
+      mini_mime (~> 1.1, >= 1.1.5)
+      multi_test (~> 1.1, >= 1.1.0)
+      sys-uname (~> 1.2, >= 1.2.3)
+    cucumber-ci-environment (9.2.0)
+    cucumber-core (12.0.0)
+      cucumber-gherkin (>= 25, < 27)
+      cucumber-messages (>= 20, < 23)
+      cucumber-tag-expressions (~> 5.0, >= 5.0.4)
+    cucumber-cucumber-expressions (17.0.1)
+    cucumber-gherkin (26.2.0)
+      cucumber-messages (>= 19.1.4, < 22.1)
+    cucumber-html-formatter (21.2.0)
+      cucumber-messages (> 19, < 25)
+    cucumber-messages (22.0.0)
+    cucumber-tag-expressions (5.0.6)
+    debug_inspector (1.2.0)
+    diff-lcs (1.5.0)
     docile (1.4.0)
-    dry-configurable (0.11.6)
-      concurrent-ruby (~> 1.0)
-      dry-core (~> 0.4, >= 0.4.7)
-      dry-equalizer (~> 0.2)
-    dry-container (0.7.2)
-      concurrent-ruby (~> 1.0)
-      dry-configurable (~> 0.1, >= 0.1.3)
-    dry-core (0.4.9)
+    dry-configurable (1.1.0)
+      dry-core (~> 1.0, < 2)
+      zeitwerk (~> 2.6)
+    dry-core (1.0.1)
       concurrent-ruby (~> 1.0)
-    dry-equalizer (0.3.0)
-    dry-inflector (0.2.0)
-    dry-initializer (3.0.3)
-    dry-logic (1.0.6)
+      zeitwerk (~> 2.6)
+    dry-inflector (1.0.0)
+    dry-initializer (3.1.1)
+    dry-logic (1.5.0)
       concurrent-ruby (~> 1.0)
-      dry-core (~> 0.2)
-      dry-equalizer (~> 0.2)
-    dry-schema (1.5.2)
+      dry-core (~> 1.0, < 2)
+      zeitwerk (~> 2.6)
+    dry-schema (1.13.3)
       concurrent-ruby (~> 1.0)
-      dry-configurable (~> 0.8, >= 0.8.3)
-      dry-core (~> 0.4)
-      dry-equalizer (~> 0.2)
+      dry-configurable (~> 1.0, >= 1.0.1)
+      dry-core (~> 1.0, < 2)
       dry-initializer (~> 3.0)
-      dry-logic (~> 1.0)
-      dry-types (~> 1.4)
-    dry-types (1.4.0)
+      dry-logic (>= 1.4, < 2)
+      dry-types (>= 1.7, < 2)
+      zeitwerk (~> 2.6)
+    dry-types (1.7.2)
+      bigdecimal (~> 3.0)
       concurrent-ruby (~> 1.0)
-      dry-container (~> 0.3)
-      dry-core (~> 0.4, >= 0.4.4)
-      dry-equalizer (~> 0.3)
-      dry-inflector (~> 0.1, >= 0.1.2)
-      dry-logic (~> 1.0, >= 1.0.2)
-    dry-validation (1.5.3)
+      dry-core (~> 1.0)
+      dry-inflector (~> 1.0)
+      dry-logic (~> 1.4)
+      zeitwerk (~> 2.6)
+    dry-validation (1.10.0)
       concurrent-ruby (~> 1.0)
-      dry-container (~> 0.7, >= 0.7.1)
-      dry-core (~> 0.4)
-      dry-equalizer (~> 0.2)
+      dry-core (~> 1.0, < 2)
       dry-initializer (~> 3.0)
-      dry-schema (~> 1.5)
-    ffi (1.16.2)
-    ffi (1.16.2-java)
-    hashdiff (1.0.1)
+      dry-schema (>= 1.12, < 2)
+      zeitwerk (~> 2.6)
+    ffi (1.16.3)
+    hashdiff (1.1.0)
     httpclient (2.8.3)
     interception (0.5)
-    json (2.3.1)
-    json (2.3.1-java)
+    json (2.7.1)
+    language_server-protocol (3.17.0.3)
     method_source (1.0.0)
-    mime-types (3.3.1)
-      mime-types-data (~> 3.2015)
-    mime-types-data (3.2021.0901)
-    multi_test (0.1.2)
-    parallel (1.19.2)
-    parser (2.7.1.4)
+    mini_mime (1.1.5)
+    multi_test (1.1.0)
+    parallel (1.24.0)
+    parser (3.3.0.5)
       ast (~> 2.4.1)
+      racc
     pry (0.14.2)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    pry (0.14.2-java)
-      coderay (~> 1.1)
-      method_source (~> 1.0)
-      spoon (~> 0.0)
-    pry-rescue (1.5.2)
+    pry-rescue (1.6.0)
       interception (>= 0.5)
       pry (>= 0.12.0)
-    pry-stack_explorer (0.4.11)
-      binding_of_caller (~> 0.7)
+    pry-stack_explorer (0.6.1)
+      binding_of_caller (~> 1.0)
       pry (~> 0.13)
-    public_suffix (4.0.5)
-    rainbow (3.0.0)
-    regexp_parser (1.7.1)
-    rexml (3.2.4)
-    rr (1.2.1)
-    rspec (3.9.0)
-      rspec-core (~> 3.9.0)
-      rspec-expectations (~> 3.9.0)
-      rspec-mocks (~> 3.9.0)
-    rspec-core (3.9.2)
-      rspec-support (~> 3.9.3)
-    rspec-expectations (3.9.2)
+    public_suffix (5.0.4)
+    racc (1.7.3)
+    rainbow (3.1.1)
+    regexp_parser (2.9.0)
+    rexml (3.2.6)
+    rr (3.1.0)
+    rspec (3.12.0)
+      rspec-core (~> 3.12.0)
+      rspec-expectations (~> 3.12.0)
+      rspec-mocks (~> 3.12.0)
+    rspec-core (3.12.2)
+      rspec-support (~> 3.12.0)
+    rspec-expectations (3.12.3)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.9.0)
-    rspec-mocks (3.9.1)
+      rspec-support (~> 3.12.0)
+    rspec-mocks (3.12.6)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.9.0)
+      rspec-support (~> 3.12.0)
     rspec-retry (0.6.2)
       rspec-core (> 3.3)
-    rspec-support (3.9.3)
-    rubocop (0.89.0)
+    rspec-support (3.12.1)
+    rubocop (1.60.2)
+      json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
-      parser (>= 2.7.1.1)
+      parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 1.7)
-      rexml
-      rubocop-ast (>= 0.1.0, < 1.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.30.0, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 2.0)
-    rubocop-ast (0.3.0)
-      parser (>= 2.7.1.4)
-    ruby-progressbar (1.10.1)
-    safe_yaml (1.0.5)
-    simplecov (0.21.2)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.30.0)
+      parser (>= 3.2.1.0)
+    ruby-progressbar (1.13.0)
+    simplecov (0.22.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov_json_formatter (0.1.4)
-    spoon (0.0.6)
-      ffi
-    sys-uname (1.2.2)
+    sys-uname (1.2.3)
       ffi (~> 1.1)
-    timers (4.3.0)
-    unicode-display_width (1.7.0)
-    vcr (6.0.0)
-    webmock (3.8.3)
-      addressable (>= 2.3.6)
+    timers (4.3.5)
+    unicode-display_width (2.5.0)
+    vcr (6.2.0)
+    webmock (3.19.1)
+      addressable (>= 2.8.0)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)
+    zeitwerk (2.6.12)
 
 PLATFORMS
-  java
   ruby
 
 DEPENDENCIES
@@ -201,4 +184,4 @@ DEPENDENCIES
   webmock
 
 BUNDLED WITH
-   2.1.4
+   2.4.20
diff --git a/VERSION b/VERSION
index 84197c894..74664af74 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-5.3.2
+5.3.3
diff --git a/lib/pubnub/version.rb b/lib/pubnub/version.rb
index 1a69da4c9..d85f14e57 100644
--- a/lib/pubnub/version.rb
+++ b/lib/pubnub/version.rb
@@ -1,4 +1,4 @@
 # Toplevel Pubnub module.
 module Pubnub
-  VERSION = '5.3.2'.freeze
+  VERSION = '5.3.3'.freeze
 end
diff --git a/pubnub.gemspec b/pubnub.gemspec
index e40479962..f2d2eccc0 100644
--- a/pubnub.gemspec
+++ b/pubnub.gemspec
@@ -16,7 +16,7 @@ Gem::Specification.new do |spec|
   spec.executables = spec.files.grep(%r{^bin\/}) { |f| File.basename(f) }
   spec.test_files = spec.files.grep(%r{^(test|spec|features)\/})
   spec.require_paths = ['lib']
-  spec.required_ruby_version = '>= 2.4'
+  spec.required_ruby_version = '>= 3.0.0'
 
   spec.add_dependency 'addressable', '>= 2.0.0'
   spec.add_dependency 'concurrent-ruby', '~> 1.1.5'