diff --git a/TransitionButton.podspec b/TransitionButton.podspec
index aba9c16..2f47b35 100755
--- a/TransitionButton.podspec
+++ b/TransitionButton.podspec
@@ -14,6 +14,7 @@ Pod::Spec.new do |s|
   s.source           = { :git => 'https://github.com/aladinway/TransitionButton.git', :tag => s.version.to_s }
   
   s.ios.deployment_target = '8.0'
+  s.swift_version = '5.0'
   
   s.source_files = 'Source/*.{h,m,swift}'
   s.frameworks = 'UIKit'