diff --git a/3.9/Dockerfile b/3.9/Dockerfile
index 402461e..61b9cf2 100644
--- a/3.9/Dockerfile
+++ b/3.9/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.9.4-slim-buster@sha256:5aa114b5c49311ae48a9e717a8c829581bb18a01f33c3130968a6ecc0e2c24c0
+FROM python:3.9.4-slim-buster@sha256:bca2bcc8afda3abca3f73ff3d9ac146076aa47d09a226290eb3c99f175b1371a
 
 # renovate: datasource=pypi depName=poetry versioning=semver
 ENV POETRY_VERSION 1.1.6