diff --git a/README.md b/README.md
index e9df7433a2..d0f2461f10 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ Where practical code should be strongly typed, ie your methods must return a typ
 
 `public function doThis() : void`
 
-PHP >= 7.1 allows the return type Nullable so there should be no circumstance a type cannot be return by using the following:
+PHP >= 7.3 allows the return type Nullable so there should be no circumstance a type cannot be return by using the following:
 
 `public function doThat() ?:string`