diff --git a/fixtures/rails5/Gemfile b/fixtures/rails5/Gemfile
index 222417985..c78b56228 100644
--- a/fixtures/rails5/Gemfile
+++ b/fixtures/rails5/Gemfile
@@ -11,7 +11,7 @@ gem 'rails', '~> 5.0.1'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3'
 # Use Puma as the app server
-gem 'puma', '~> 3.0'
+gem 'puma', '~> 5.6'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'
 # Use Uglifier as compressor for JavaScript assets
diff --git a/fixtures/rails5/Gemfile.lock b/fixtures/rails5/Gemfile.lock
index 5e3ecd47f..ad9226b20 100644
--- a/fixtures/rails5/Gemfile.lock
+++ b/fixtures/rails5/Gemfile.lock
@@ -80,7 +80,8 @@ GEM
     nio4r (2.1.0)
     nokogiri (1.8.0)
       mini_portile2 (~> 2.2.0)
-    puma (3.9.1)
+    puma (5.6.8)
+      nio4r (~> 2.0)
     rack (2.0.3)
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -155,7 +156,7 @@ DEPENDENCIES
   jbuilder (~> 2.5)
   jquery-rails
   listen (~> 3.0.5)
-  puma (~> 3.0)
+  puma (~> 5.6)
   rails (~> 5.0.1)
   sass-rails (~> 5.0)
   sqlite3