diff --git a/MessageKit.podspec b/MessageKit.podspec
index cd170fcd..189619f6 100644
--- a/MessageKit.podspec
+++ b/MessageKit.podspec
@@ -12,7 +12,7 @@ Pod::Spec.new do |s|
    s.source_files = 'Sources/**/*.swift'
 
    s.pod_target_xcconfig = {
-      "SWIFT_VERSION" => "4.1",
+      "SWIFT_VERSION" => "4.0",
    }
 
    s.ios.deployment_target = '9.0'