Update swift version in README

diff --git a/README.md b/README.md
index 5614f5d4c58fdcba70bd302af7963c71db311563..0ee2657990a852eaa85c837757e8027ccc8f2f82 100644 (file)
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ In order to configure
 
 ## Building
 
-The build has only been tested on OSX using Swift 3.1. Building defaults
+The build has only been tested on OSX using Swift 5.0.1. Building defaults
 to the debug configuration.
 
 ```