diff --git a/3.9/Dockerfile b/3.9/Dockerfile
index 5d9ecc2..622fc35 100644
--- a/3.9/Dockerfile
+++ b/3.9/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.9.2-slim-buster@sha256:bb8911d79f5451a03748e65ec8944504b71ac09722c7ddbc5742daf7465a32c1
+FROM python:3.9.2-slim-buster@sha256:70b693f32768b122a6a5247b0c5d4394da69f5dc3baace93a34860bff00d8ecd
 
 # renovate: datasource=pypi depName=poetry versioning=semver
 ENV POETRY_VERSION v1.1.4