diff --git a/quants_lab/controllers/bollinger_v1.py b/quants_lab/controllers/bollinger_v1.py
index a0f0566d..30c13727 100644
--- a/quants_lab/controllers/bollinger_v1.py
+++ b/quants_lab/controllers/bollinger_v1.py
@@ -1,5 +1,4 @@
 import time
-from typing import Optional
 
 import pandas as pd
 import pandas_ta as ta