diff --git a/testapp/Gemfile b/testapp/Gemfile
index c5cf1b1..e184a8e 100644
--- a/testapp/Gemfile
+++ b/testapp/Gemfile
@@ -8,7 +8,7 @@ gem 'rails'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3'
 # Use Puma as the app server
-gem 'puma', '~> 4.3'
+gem 'puma', '~> 5.6'
 # Use dotenv to load development env variables
 gem 'dotenv-rails', require: 'dotenv/rails-now'
 
diff --git a/testapp/Gemfile.lock b/testapp/Gemfile.lock
index 70d09bb..d2a7126 100644
--- a/testapp/Gemfile.lock
+++ b/testapp/Gemfile.lock
@@ -147,7 +147,7 @@ GEM
     minitest (5.14.4)
     multi_json (1.15.0)
     multipart-post (2.1.1)
-    nio4r (2.5.7)
+    nio4r (2.5.8)
     nokogiri (1.11.3)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
@@ -156,7 +156,7 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     public_suffix (4.0.6)
-    puma (4.3.7)
+    puma (5.6.2)
       nio4r (~> 2.0)
     racc (1.5.2)
     rack (2.2.3)
@@ -230,7 +230,7 @@ PLATFORMS
 DEPENDENCIES
   dotenv-rails
   pry
-  puma (~> 4.3)
+  puma (~> 5.6)
   rails
   rspec
   sqlite3