diff --git a/Solidity.g4 b/Solidity.g4
index 95a098b..27f7a04 100644
--- a/Solidity.g4
+++ b/Solidity.g4
@@ -367,7 +367,7 @@ identifier
   : ('from' | 'calldata' | Identifier) ;
 
 VersionLiteral
-  : [0-9]+ '.' [0-9]+ '.' [0-9]+ ;
+  : [0-9]+ '.' [0-9]+ ('.' [0-9]+)? ;
 
 BooleanLiteral
   : 'true' | 'false' ;