diff --git a/Gemfile b/Gemfile
index d47a564f..80773c85 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem 'rails', '~> 6.0.0'
 # Use postgresql as the database for Active Record
 gem 'pg', '>= 0.18', '< 2.0'
 # Use Puma as the app server
-gem 'puma', '~> 4.3'
+gem 'puma', '~> 5.6'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5'
 # Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
diff --git a/Gemfile.lock b/Gemfile.lock
index 1b18dcd8..905513b5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -195,7 +195,7 @@ GEM
     net-smtp (0.3.3)
       net-protocol
     netrc (0.11.0)
-    nio4r (2.5.9)
+    nio4r (2.7.0)
     nokogiri (1.15.2)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
@@ -205,7 +205,7 @@ GEM
       forwardable
       singleton
     public_suffix (5.0.0)
-    puma (4.3.12)
+    puma (5.6.8)
       nio4r (~> 2.0)
     racc (1.6.2)
     rack (2.2.7)
@@ -399,7 +399,7 @@ DEPENDENCIES
   lockbox
   logstop (~> 0.3.0)
   pg (>= 0.18, < 2.0)
-  puma (~> 4.3)
+  puma (~> 5.6)
   rack-cors
   rails (~> 6.0.0)
   rest-client