diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index b9de35ee..26874037 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -50,7 +50,7 @@ jobs:
       - name: Login to Harbor
         uses: docker/login-action@465a07811f14bebb1938fbed4728c6a1ff8901fc # v2.2.0
         with:
-          registry: harbor.stfc.ac.uk/datagateway
+          registry: ${{ secrets.HARBOR_URL }}
           username: ${{ secrets.HARBOR_USERNAME }}
           password: ${{ secrets.HARBOR_TOKEN }}
 
@@ -58,7 +58,7 @@ jobs:
         id: meta
         uses: docker/metadata-action@818d4b7b91585d195f67373fd9cb0332e31a7175 # v4.6.0
         with:
-          images: harbor.stfc.ac.uk/datagateway/scigateway
+          images: ${{ secrets.HARBOR_URL }}/scigateway
 
       - name: Build and push Docker image to Harbor
         uses: docker/build-push-action@0a97817b6ade9f46837855d676c4cca3a2471fc9 # v4.2.1
diff --git a/Dockerfile b/Dockerfile
index dda5bcd3..70fb4951 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 # Dockerfile to build and serve scigateway
 
 # Build stage
-FROM node:20.11-alpine3.18 as builder
+FROM node:20.11.1-alpine3.19@sha256:bf77dc26e48ea95fca9d1aceb5acfa69d2e546b765ec2abfb502975f1a2d4def as builder
 
 WORKDIR /scigateway-build
 
@@ -24,7 +24,7 @@ COPY docker/settings.json public/settings.json
 RUN yarn build
 
 # Run stage
-FROM httpd:2.4-alpine3.15
+FROM httpd:2.4.58-alpine3.19@sha256:92535cf7f151901ba91b04186292c3bd5bf82aa6ffa6eb7bc405fefbffedd480
 
 WORKDIR /usr/local/apache2/htdocs