diff --git a/uvl/UVLBase.g4 b/uvl/UVLBase.g4
index 3e60abd..26cfa05 100644
--- a/uvl/UVLBase.g4
+++ b/uvl/UVLBase.g4
@@ -147,7 +147,7 @@ COMMA: ',';
 ID_NOT_STRICT: '"'~[\r\n".]+'"';
 ID_STRICT: [a-zA-Z]([a-zA-Z0-9_] | '#' | '§' | '%' | '?' | '\\' | '\'' | 'ä' | 'ü' | 'ö' | 'ß' | ';')*;
 
-STRING: '\''~[\r\n'.]+'\'';
+STRING: '\''~[\r\n']+'\'';
 
 SKIP_
   : ( SPACES | COMMENT ) -> skip