diff --git a/Gemfile b/Gemfile
index dadd030..96d3e21 100644
--- a/Gemfile
+++ b/Gemfile
@@ -13,7 +13,7 @@ gem 'pg', '~> 1.0'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3'
 # Use Puma as the app server
-gem 'puma', '~> 4.0'
+gem 'puma', '~> 5.6'
 # Use Uglifier as compressor for JavaScript assets
 gem 'uglifier', '>= 1.3.0'
 # Use CoffeeScript for .coffee assets and views
diff --git a/Gemfile.lock b/Gemfile.lock
index 56fd99f..a63c00e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -157,7 +157,7 @@ GEM
     orm_adapter (0.5.0)
     pg (1.5.7)
     pr_geohash (1.0.0)
-    puma (4.3.12)
+    puma (5.6.8)
       nio4r (~> 2.0)
     pundit (2.3.2)
       activesupport (>= 3.0.0)
@@ -288,7 +288,7 @@ DEPENDENCIES
   listen (~> 3.0.5)
   openseadragon
   pg (~> 1.0)
-  puma (~> 4.0)
+  puma (~> 5.6)
   pundit
   rails (< 7.0)
   rgeo