diff --git a/sso_login_box.gemspec b/sso_login_box.gemspec
index f541260..23ad0f0 100644
--- a/sso_login_box.gemspec
+++ b/sso_login_box.gemspec
@@ -13,7 +13,7 @@ Gem::Specification.new do |s|
   s.summary     = "Summary of SsoLoginBox."
   s.description = "Description of SsoLoginBox."
   s.license     = "MIT"
-  s.add_dependency 'ruby-saml', '~> 1.12.2'
+  s.add_dependency 'ruby-saml', '1.11.0'
   s.files = Dir["{app,config,db,lib}/**/*", "MIT-LICENSE", "Rakefile", "README.rdoc"]
   s.test_files = Dir["test/**/*"]
 end