diff --git a/code/Bonus_Ch16/pyproject.toml b/code/Bonus_Ch16/pyproject.toml
index 90e8b58..1944701 100644
--- a/code/Bonus_Ch16/pyproject.toml
+++ b/code/Bonus_Ch16/pyproject.toml
@@ -23,7 +23,7 @@ dependencies = [
     "debugpy==1.8.17",
     "decorator==5.2.1",
     "executing==2.2.1",
-    "filelock==3.20.0",
+    "filelock==3.20.1",
     "fonttools==4.60.1",
     "frozenlist==1.8.0",
     "fs==2.4.16",