diff --git a/spec/test-app/Gemfile b/spec/test-app/Gemfile
index 7ab0618..74c8b07 100644
--- a/spec/test-app/Gemfile
+++ b/spec/test-app/Gemfile
@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
-gem 'rails', '4.2.5.2'
+gem 'rails', '5.2.8.1'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3'