diff --git a/Dockerfile b/Dockerfile
index fb592f6c14..17e8596271 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 # The devcontainer should use the developer target and run as root with podman
 # or docker with user namespaces.
 # Version SHA has been removed, see: https://github.com/DiamondLightSource/blueapi/issues/1053
-ARG PYTHON_VERSION=3.11
+ARG PYTHON_VERSION=3.11@sha256:bf2d36b8fb1b4a0b590b36736cdd8a6b5175b411bf135c42694ecd68ab8fed02
 FROM python:${PYTHON_VERSION} AS developer
 
 # Add any system dependencies for the developer/build environment here
diff --git a/helm/blueapi/values.yaml b/helm/blueapi/values.yaml
index 9376bc524a..93f1d2f155 100644
--- a/helm/blueapi/values.yaml
+++ b/helm/blueapi/values.yaml
@@ -9,7 +9,7 @@ image:
   # This sets the pull policy for images.
   pullPolicy: IfNotPresent
   # Overrides the image tag whose default is the chart appVersion.
-  tag: ""
+  tag: "@sha256:e1de6ed55b01fe55c140197a533cc0c32f4cca8000b376ae4fb0eb3b75babdcc"
 
 # This is for the secrets for pulling an image from a private repository more information can be found here: https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/
 imagePullSecrets: []