diff --git a/strong_parameters.gemspec b/strong_parameters.gemspec
index 6b65f09..4fdaeae 100644
--- a/strong_parameters.gemspec
+++ b/strong_parameters.gemspec
@@ -14,9 +14,9 @@ Gem::Specification.new do |s|
   s.files = Dir["{app,config,db,lib}/**/*"] + ["MIT-LICENSE", "Rakefile", "README.rdoc"]
   s.test_files = Dir["test/**/*"]
 
-  s.add_dependency "actionpack", ">= 3.2.0"
-  s.add_dependency "activemodel", ">= 3.2.0"
-  s.add_dependency "railties", ">= 3.2.0"
+  s.add_dependency "actionpack", "~> 3.2"
+  s.add_dependency "activemodel", "~> 3.2"
+  s.add_dependency "railties", "~> 3.2"
 
   s.add_development_dependency "rake"
 end