diff --git a/Gemfile b/Gemfile
index 3214360a..799a53cf 100644
--- a/Gemfile
+++ b/Gemfile
@@ -16,7 +16,7 @@ gem 'importmap-rails'
 gem 'jbuilder'
 gem 'pg', '~> 1.5'
 gem 'postmark-rails'
-gem 'puma', '~> 5.6'
+gem 'puma', '~> 6.3'
 gem 'rails', '~> 7.0.6'
 gem 'redis', '~> 4.0'
 gem 'sprockets-rails'
diff --git a/Gemfile.lock b/Gemfile.lock
index e871c308..2f0c1d0e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -200,7 +200,7 @@ GEM
       actionmailer (>= 3.0.0)
       postmark (>= 1.21.3, < 2.0)
     public_suffix (5.0.3)
-    puma (5.6.7)
+    puma (6.3.1)
       nio4r (~> 2.0)
     racc (1.7.1)
     rack (2.2.8)
@@ -327,7 +327,7 @@ DEPENDENCIES
   letter_opener
   pg (~> 1.5)
   postmark-rails
-  puma (~> 5.6)
+  puma (~> 6.3)
   rails (~> 7.0.6)
   redis (~> 4.0)
   rubocop-capybara