diff --git a/CHANGELOG b/CHANGELOG
index f170f0fb..c3db7dca 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,8 @@
+== 4.0.0 (2022-03-03)
+
+* Drop support for Ruby < 2.5 (@frostmark)
+* Drop support for Rails < 5.2 (@bensheldon)
+
 == 3.1.0 (2022-01-29)
 
 * Invoke on_assignment callback after assignment is stored in database; add global on_assignment callback (@frostmark)
diff --git a/Gemfile.lock b/Gemfile.lock
index 477a3266..f3d6ffd3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    vanity (3.2.0)
+    vanity (4.0.0)
       i18n
 
 GEM
@@ -44,7 +44,7 @@ GEM
       activesupport (>= 2.2.0)
       crack (>= 0.1.6)
     hitimes (1.2.2)
-    i18n (1.9.1)
+    i18n (1.10.0)
       concurrent-ruby (~> 1.0)
     integration (0.1.0)
     jdbc-sqlite3 (3.8.7)
diff --git a/gemfiles/rails52.gemfile.lock b/gemfiles/rails52.gemfile.lock
index 89b6bfb6..e5b280e1 100644
--- a/gemfiles/rails52.gemfile.lock
+++ b/gemfiles/rails52.gemfile.lock
@@ -7,7 +7,7 @@ GIT
 PATH
   remote: ..
   specs:
-    vanity (3.2.0)
+    vanity (4.0.0)
       i18n
 
 GEM
diff --git a/gemfiles/rails60.gemfile.lock b/gemfiles/rails60.gemfile.lock
index a17970d7..2e8b510c 100644
--- a/gemfiles/rails60.gemfile.lock
+++ b/gemfiles/rails60.gemfile.lock
@@ -7,7 +7,7 @@ GIT
 PATH
   remote: ..
   specs:
-    vanity (3.2.0)
+    vanity (4.0.0)
       i18n
 
 GEM
diff --git a/gemfiles/rails61.gemfile.lock b/gemfiles/rails61.gemfile.lock
index a17970d7..2e8b510c 100644
--- a/gemfiles/rails61.gemfile.lock
+++ b/gemfiles/rails61.gemfile.lock
@@ -7,7 +7,7 @@ GIT
 PATH
   remote: ..
   specs:
-    vanity (3.2.0)
+    vanity (4.0.0)
       i18n
 
 GEM
diff --git a/lib/vanity/version.rb b/lib/vanity/version.rb
index 3e9da591..695555d5 100644
--- a/lib/vanity/version.rb
+++ b/lib/vanity/version.rb
@@ -1,5 +1,5 @@
 module Vanity
-  VERSION = "3.2.0"
+  VERSION = "4.0.0"
 
   module Version
     version = VERSION.to_s.split(".").map { |i| i.to_i }