diff --git a/Gemfile b/Gemfile
index 3700041..93a9706 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,7 @@ gem "rails", "~> 7.0.0.alpha2"
 gem "sqlite3", "~> 1.4"
 
 # Use the Puma web server [https://github.com/puma/puma]
-gem "puma", "~> 5.0"
+gem "puma", "~> 5.6"
 
 # Use JavaScript with ESM import maps [https://github.com/rails/importmap-rails]
 gem "importmap-rails", ">= 0.3.4"
diff --git a/Gemfile.lock b/Gemfile.lock
index 448e6d4..31fb6d3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -106,8 +106,10 @@ GEM
     nio4r (2.5.8)
     nokogiri (1.12.5-x86_64-darwin)
       racc (~> 1.4)
+    nokogiri (1.12.5-x86_64-linux)
+      racc (~> 1.4)
     public_suffix (4.0.6)
-    puma (5.5.2)
+    puma (5.6.4)
       nio4r (~> 2.0)
     racc (1.6.0)
     rack (2.2.3)
@@ -183,6 +185,7 @@ GEM
 
 PLATFORMS
   x86_64-darwin-20
+  x86_64-linux
 
 DEPENDENCIES
   bootsnap (>= 1.4.4)
@@ -190,7 +193,7 @@ DEPENDENCIES
   debug (>= 1.0.0)
   importmap-rails (>= 0.3.4)
   jbuilder (~> 2.7)
-  puma (~> 5.0)
+  puma (~> 5.6)
   rails (~> 7.0.0.alpha2)
   selenium-webdriver
   sqlite3 (~> 1.4)