diff --git a/stock/requirements.txt b/stock/requirements.txt
index c71dcec..dbc5146 100644
--- a/stock/requirements.txt
+++ b/stock/requirements.txt
@@ -11,4 +11,5 @@ finance-datareader==0.9.110
 lxml==6.1.0
 pytest==8.3.2
 pytest-asyncio==0.24.0
+cachetools>=5.3