diff --git a/Gemfile b/Gemfile
index fc30b98..18adef5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 6.0.2', '>= 6.0.2.1'
 # Use postgresql as the database for Active Record
 gem 'pg', '>= 0.18', '< 2.0'
 # Use Puma as the app server
-gem 'puma', '~> 4.1'
+gem 'puma', '~> 4.3'
 # Use SCSS for stylesheets
 gem 'sass-rails', '>= 6'
 # Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
diff --git a/Gemfile.lock b/Gemfile.lock
index e24211e..f0cdf2e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -79,6 +79,7 @@ GEM
     domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
     erubi (1.9.0)
+    ffi (1.12.2)
     ffi (1.12.2-x64-mingw32)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
@@ -112,14 +113,18 @@ GEM
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.14.0)
+    msgpack (1.3.3)
     msgpack (1.3.3-x64-mingw32)
     net-http-digest_auth (1.4.1)
     net-http-persistent (3.1.0)
       connection_pool (~> 2.2)
-    nio4r (2.5.2)
+    nio4r (2.5.8)
+    nokogiri (1.10.9)
+      mini_portile2 (~> 2.4.0)
     nokogiri (1.10.9-x64-mingw32)
       mini_portile2 (~> 2.4.0)
     ntlm-http (0.1.1)
+    pg (1.2.2)
     pg (1.2.2-x64-mingw32)
     polyamorous (2.3.2)
       activerecord (>= 5.2.1)
@@ -127,7 +132,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     public_suffix (4.0.3)
-    puma (4.3.3)
+    puma (4.3.11)
       nio4r (~> 2.0)
     rack (2.2.2)
     rack-proxy (0.6.5)
@@ -170,6 +175,8 @@ GEM
     rubyzip (2.3.0)
     sass-rails (6.0.0)
       sassc-rails (~> 2.1, >= 2.1.1)
+    sassc (2.2.1)
+      ffi (~> 1.9)
     sassc (2.2.1-x64-mingw32)
       ffi (~> 1.9)
     sassc-rails (2.1.2)
@@ -229,6 +236,7 @@ GEM
 
 PLATFORMS
   x64-mingw32
+  x86_64-linux
 
 DEPENDENCIES
   bootsnap (>= 1.4.2)
@@ -239,7 +247,7 @@ DEPENDENCIES
   nokogiri
   pg (>= 0.18, < 2.0)
   pry
-  puma (~> 4.1)
+  puma (~> 4.3)
   rails (~> 6.0.2, >= 6.0.2.1)
   ransack
   sass-rails (>= 6)