diff --git a/async_request.gemspec b/async_request.gemspec
index a56b672..14c1c7f 100644
--- a/async_request.gemspec
+++ b/async_request.gemspec
@@ -18,7 +18,7 @@ Gem::Specification.new do |s|
   s.test_files = Dir["spec/**/*"]
 
   s.add_dependency "rails", ">= 4.2"
-  s.add_dependency "sidekiq", "~> 4.0"
+  s.add_dependency 'sidekiq', '>= 4.0', '< 6'
 
   s.add_development_dependency "pg"
   s.add_development_dependency "pry"
diff --git a/lib/async_request/version.rb b/lib/async_request/version.rb
index e8ab157..561a30d 100644
--- a/lib/async_request/version.rb
+++ b/lib/async_request/version.rb
@@ -1,3 +1,3 @@
 module AsyncRequest
-  VERSION = '0.0.7'.freeze
+  VERSION = '0.0.8'.freeze
 end