diff --git a/BeaconKit.podspec b/BeaconKit.podspec
index ee8e2d9..f7c59e8 100644
--- a/BeaconKit.podspec
+++ b/BeaconKit.podspec
@@ -18,7 +18,7 @@ Pod::Spec.new do |s|
   s.source       = { :git => 'https://github.com/igor-makarov/BeaconKit.git', 
                      :tag => "#{s.version}" }
 
-  s.swift_versions = [ '4.0', '4.2' ]                    
+  s.swift_version = '4.0'
   s.ios.deployment_target = '9.0'
   s.osx.deployment_target = '10.12'
   s.source_files = 'Sources/BeaconKit/**/*.swift'