diff --git a/activejob/activejob.gemspec b/activejob/activejob.gemspec
index c74daa5045..9944b2a1bd 100644
--- a/activejob/activejob.gemspec
+++ b/activejob/activejob.gemspec
@@ -18,5 +18,6 @@ Gem::Specification.new do |s|
   s.files        = Dir['CHANGELOG.md', 'MIT-LICENSE', 'README.md', 'lib/**/*']
   s.require_path = 'lib'
 
+  s.add_dependency 'activesupport', version
   s.add_dependency 'globalid', '>= 0.2.3'
 end