diff --git a/doorkeeper-openid_connect.gemspec b/doorkeeper-openid_connect.gemspec
index 99c6a96..45e1ae4 100644
--- a/doorkeeper-openid_connect.gemspec
+++ b/doorkeeper-openid_connect.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = ">= 2.3"
 
-  spec.add_runtime_dependency 'doorkeeper', '>= 5.0'
+  spec.add_runtime_dependency 'doorkeeper', '>= 5.0', '< 5.2'
   spec.add_runtime_dependency 'json-jwt', '~> 1.6'
 
   spec.add_development_dependency 'rspec-rails'