diff --git a/code/Ch2/pyproject.toml b/code/Ch2/pyproject.toml
index a800637..51e860d 100644
--- a/code/Ch2/pyproject.toml
+++ b/code/Ch2/pyproject.toml
@@ -21,7 +21,7 @@ dependencies = [
     "decorator==5.2.1",
     "dnspython==2.8.0",
     "executing==2.2.1",
-    "filelock==3.19.1",
+    "filelock==3.20.1",
     "frozendict==2.4.6",
     "idna==3.10",
     "influxdb3-python==0.16.0",