diff --git a/docker/Dockerfile b/docker/Dockerfile
index 7123937e2..4c41b9185 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.5-slim
+FROM python:3.5-slim-jessie
 
 ARG HTTP_PROXY
 ARG HTTPS_PROXY
diff --git a/requirements.txt b/requirements.txt
index cb6f98e17..f100028f3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,4 +19,4 @@ notifications-python-client==4.8.2
 # PaaS
 awscli-cwlogs>=1.4,<1.5
 
-git+https://github.com/alphagov/notifications-utils.git@29.3.1#egg=notifications-utils==29.3.1
+git+https://github.com/alphagov/notifications-utils.git@29.3.1#egg=notifications-utils==29.3.2