diff --git a/Gemfile.lock b/Gemfile.lock
index 260d80b..61c053a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     active_elastic_job (1.4.4)
       aws-sdk (~> 2)
-      rails (>= 4.2)
+      rails (>= 4.2, < 5.0.1)
 
 GEM
   remote: https://rubygems.org/
diff --git a/active-elastic-job.gemspec b/active-elastic-job.gemspec
index c1f5e47..370cc7e 100644
--- a/active-elastic-job.gemspec
+++ b/active-elastic-job.gemspec
@@ -23,5 +23,5 @@ Gem::Specification.new do |spec|
   spec.required_ruby_version = '>= 1.9.3'
 
   spec.add_dependency 'aws-sdk', '~> 2'
-  spec.add_dependency 'rails', '>= 4.2'
+  spec.add_dependency 'rails', '>= 4.2', '< 5.0.1'
 end