diff --git a/02_syntax/lexer.py b/02_syntax/lexer.py
index 46e7cbf..3274be1 100644
--- a/02_syntax/lexer.py
+++ b/02_syntax/lexer.py
@@ -49,7 +49,7 @@ def t_whitespace(t):
     t.lexer.lineno += t.value.count('\n')
 
 def t_comment(t):
-    r'\(%(.|\n)*%\)'
+    r'\(%(.|\n)*?%\)'
     t.lexer.lineno += t.value.count('\n')
 
 t_LPAREN        = r'\('