diff --git a/Gemfile b/Gemfile
index 8c987723..caf17a18 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,7 +11,7 @@ gem 'rails', '6.1.3.2'
 gem "mysql2"
 
 # 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 bdbed63e..4604bb1d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -149,11 +149,11 @@ GEM
     multipart-post (2.1.1)
     mysql2 (0.5.3)
     naught (1.1.0)
-    nio4r (2.5.7)
+    nio4r (2.5.8)
     nokogiri (1.11.7-x86_64-linux)
       racc (~> 1.4)
     public_suffix (4.0.6)
-    puma (4.3.8)
+    puma (4.3.11)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -297,7 +297,7 @@ DEPENDENCIES
   json_expressions
   listen (>= 3.0.5, < 3.2)
   mysql2
-  puma (~> 4.1)
+  puma (~> 4.3)
   rails (= 6.1.3.2)
   redis
   ridgepole