diff --git a/3.9/Dockerfile b/3.9/Dockerfile
index 1216315..aef5a69 100644
--- a/3.9/Dockerfile
+++ b/3.9/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.9.5-slim-buster@sha256:b4e24afb5d0e06ff924df887ce7f9358af93226287b8a2a14b62ba6281a858e1
+FROM python:3.9.5-slim-buster@sha256:b9f31c700254bc13df8923352b9b0660e8c81db9bc676747509b561eee0ca3f5
 
 # renovate: datasource=pypi depName=poetry versioning=semver
 ENV POETRY_VERSION 1.1.6