diff --git a/Reachability.podspec b/Reachability.podspec
index 5c6a12e..8627813 100644
--- a/Reachability.podspec
+++ b/Reachability.podspec
@@ -27,6 +27,7 @@ Pod::Spec.new do |s|
   s.framework    = 'SystemConfiguration'
 
   s.requires_arc = true
+  s.swift_version = "4.1"
   s.ios.deployment_target = "6.0"
   s.osx.deployment_target = "10.8"
   s.tvos.deployment_target = "9.0"