diff --git a/spec/support/rails_app/Gemfile b/spec/support/rails_app/Gemfile
index 3b20179..3938a23 100644
--- a/spec/support/rails_app/Gemfile
+++ b/spec/support/rails_app/Gemfile
@@ -7,7 +7,7 @@ end
 
 gem 'rails', '~> 5.0.7'
 gem 'pg', '>= 0.18', '< 2.0'
-gem 'puma', '~> 3.0'
+gem 'puma', '~> 5.6'
 
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
diff --git a/spec/support/rails_app/Gemfile.lock b/spec/support/rails_app/Gemfile.lock
index 3a4f408..50f77a5 100644
--- a/spec/support/rails_app/Gemfile.lock
+++ b/spec/support/rails_app/Gemfile.lock
@@ -76,7 +76,8 @@ GEM
     nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
     pg (1.2.3)
-    puma (3.12.6)
+    puma (5.6.2)
+      nio4r (~> 2.0)
     rack (2.2.3)
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -143,7 +144,7 @@ DEPENDENCIES
   google-protobuf (~> 3.9)
   listen (~> 3.0.5)
   pg (>= 0.18, < 2.0)
-  puma (~> 3.0)
+  puma (~> 5.6)
   rails (~> 5.0.7)
   railway-ipc!
   spring