diff --git a/3.9/Dockerfile b/3.9/Dockerfile
index 0e37bc8..e427b00 100644
--- a/3.9/Dockerfile
+++ b/3.9/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.9.1-slim-buster@sha256:b2013807b8af03d66f60a979f20d4e93e4e4a111df1287d9632c8cfd41ecfa33
+FROM python:3.9.1-slim-buster@sha256:af2d64e6de9f891bd5958a498bd2394389143749b3c57ffcc8c2aec054b28ad5
 
 # renovate: datasource=pypi depName=poetry versioning=semver
 ENV POETRY_VERSION v1.1.4