diff --git a/main.py b/main.py
index df76eca..6015666 100644
--- a/main.py
+++ b/main.py
@@ -5,7 +5,7 @@ from lexical.lexical import Lexical
 from syntax.syntax import Syntax
 from syntax.syntax import LL1Generator
 import sys
-from Optimizer.optimizer import optimize, output_ir_str
+from Optimizer.Optimizer import optimize, output_ir_str
 
 from semantic.rule import symbol_table_pool