diff --git a/Gemfile b/Gemfile
index b7a14f57..abdda5a7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -38,7 +38,7 @@ 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 70773cf8..b0e721bd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -219,9 +219,9 @@ GEM
     pg (1.2.3-x64-mingw32)
     pg (1.2.3-x86-mingw32)
     public_suffix (4.0.6)
-    puma (4.3.8)
+    puma (4.3.12)
       nio4r (~> 2.0)
-    puma (4.3.8-java)
+    puma (4.3.12-java)
       nio4r (~> 2.0)
     pundit (2.1.1)
       activesupport (>= 3.0.0)
@@ -383,7 +383,7 @@ DEPENDENCIES
   pandoc-ruby
   passenger (>= 5.3.2)
   pg (>= 0.18, < 2.0)
-  puma (~> 4.1)
+  puma (~> 4.3)
   pundit
   rails (~> 6.0.2, >= 6.0.2.1)
   rails-latex