diff --git a/3.9/Dockerfile b/3.9/Dockerfile
index de7451e..1b00817 100644
--- a/3.9/Dockerfile
+++ b/3.9/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.9.5-slim-buster@sha256:9f7411e82627e4ab371968a7b133928c9d06d5517a29d2c670a311066fdddb12
+FROM python:3.9.5-slim-buster@sha256:9828573e6a0b02b6d0ff0bae0716b027aa21cf8e59ac18a76724d216bab7ef04
 
 # renovate: datasource=pypi depName=poetry versioning=semver
 ENV POETRY_VERSION 1.1.7