diff --git a/sidekiq.gemspec b/sidekiq.gemspec
index a00cfadd..9d8b3d48 100644
--- a/sidekiq.gemspec
+++ b/sidekiq.gemspec
@@ -15,7 +15,7 @@ Gem::Specification.new do |gem|
   gem.version       = Sidekiq::VERSION
   gem.add_dependency                  'redis'
   gem.add_dependency                  'redis-namespace'
-  gem.add_dependency                  'connection_pool', '>= 0.9.0'
+  gem.add_dependency                  'connection_pool', '~> 0.9.0'
   gem.add_dependency                  'celluloid'
   gem.add_dependency                  'multi_json'
   gem.add_development_dependency      'minitest'