diff --git a/Gemfile b/Gemfile
index b0f57e56..9685ffd2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -38,7 +38,7 @@ gem 'omniauth-cas'
 gem 'open3'
 gem 'pg'
 # Use Puma as the app server
-gem 'puma', '~> 4.3'
+gem 'puma', '~> 5.6'
 gem 'rubyzip'
 # Use SCSS for stylesheets
 gem 'sass-rails'
diff --git a/Gemfile.lock b/Gemfile.lock
index c73a1f86..663e95f0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -293,7 +293,7 @@ GEM
       byebug (~> 11.0)
       pry (~> 0.13.0)
     public_suffix (4.0.6)
-    puma (4.3.12)
+    puma (5.6.7)
       nio4r (~> 2.0)
     racc (1.7.1)
     rack (2.2.7)
@@ -530,7 +530,7 @@ DEPENDENCIES
   open3
   pg
   pry-byebug
-  puma (~> 4.3)
+  puma (~> 5.6)
   rails (~> 7.0)
   rspec
   rspec-rails