diff --git a/src/parser/parser.yc b/src/parser/parser.yc
index d094749..b34190d 100644
--- a/src/parser/parser.yc
+++ b/src/parser/parser.yc
@@ -128,10 +128,15 @@ constant
 primary_expression
     : IDENTIFIER
     | constant
-    | STRING_LITERAL
+    | string_literals
     | LPAREN expression RPAREN
     ;
 
+string_literals
+    : STRING_LITERAL
+    | string_literals STRING_LITERAL
+    ;
+
 postfix_expression
     : primary_expression
     | postfix_expression LBRACKET expression RBRACKET