diff --git a/3.9/Dockerfile b/3.9/Dockerfile
index 61b9cf2..b627afe 100644
--- a/3.9/Dockerfile
+++ b/3.9/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.9.4-slim-buster@sha256:bca2bcc8afda3abca3f73ff3d9ac146076aa47d09a226290eb3c99f175b1371a
+FROM python:3.9.4-slim-buster@sha256:d35ab472c4e3c711ce00bbc682ba243dcbefab15bcf47126ecbf1c60dc19f9b9
 
 # renovate: datasource=pypi depName=poetry versioning=semver
 ENV POETRY_VERSION 1.1.6