diff --git a/requirements.txt b/requirements.txt
index 4c11811f..b9312e02 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 certifi==2026.7.22
 cryptography==50.0.2
-filelock==4.0.12
+filelock==4.2.1
 google-auth==2.61.0
 google-cloud-sql==0.1.1
 idna==3.20