diff --git a/ios/system_proxy.podspec b/ios/system_proxy.podspec
index 63bc8a3..13bebaf 100644
--- a/ios/system_proxy.podspec
+++ b/ios/system_proxy.podspec
@@ -15,6 +15,7 @@ A new flutter plugin project.
   s.source_files = 'Classes/**/*'
   s.public_header_files = 'Classes/**/*.h'
   s.dependency 'Flutter'
+  s.swift_version = "5.0"
 
   s.ios.deployment_target = '8.0'
 end