diff --git a/Gemfile b/Gemfile
index aed91bd..f6ed939 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ gem "rails", "~> 6.1"
 # Use sqlite3 as the database for Active Record
 gem "sqlite3", "~> 1.4"
 # Use Puma as the app server
-gem "puma", "~> 5.0"
+gem "puma", "~> 6.4"
 # Use SCSS for stylesheets
 gem "sass-rails", "~> 5"
 # https://github.com/rails/jsbundling-rails
diff --git a/Gemfile.lock b/Gemfile.lock
index 949be29..a502eaa 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -175,7 +175,7 @@ GEM
     prometheus-client (4.2.3)
       base64
     public_suffix (6.0.1)
-    puma (5.6.9)
+    puma (6.4.3)
       nio4r (~> 2.0)
     raabro (1.4.0)
     racc (1.8.1)
@@ -357,7 +357,7 @@ DEPENDENCIES
   mocha
   net-pop!
   prometheus-client
-  puma (~> 5.0)
+  puma (~> 6.4)
   rack-mini-profiler (~> 2.0)
   rails (~> 6.1)
   rufus-scheduler