diff --git a/.github/workflows/chartpress.yaml b/.github/workflows/chartpress.yaml
index ef0c61d0..d9d172e5 100644
--- a/.github/workflows/chartpress.yaml
+++ b/.github/workflows/chartpress.yaml
@@ -30,7 +30,7 @@ jobs:
         run: |
           pip install chartpress six ruamel.yaml
       - name: Run Chartpress
-        run: chartpress --push
+        run: chartpress --push --build-args RAILS_MASTER_KEY=${{ secrets.RAILS_MASTER_KEY }}
         env:
           GITHUB_TOKEN: ${{ secrets.GHCR_GITHUB_TOKEN }}
       ################ Development secrets ################
diff --git a/images/web/Dockerfile b/images/web/Dockerfile
index 44b324a2..63bb984b 100644
--- a/images/web/Dockerfile
+++ b/images/web/Dockerfile
@@ -2,8 +2,10 @@ FROM ruby:3.3.0
 ENV DEBIAN_FRONTEND=noninteractive
 ENV workdir=/var/www
 
-# Production OSM setup
+# Environment Variables
 ENV RAILS_ENV=production
+ARG RAILS_MASTER_KEY
+ENV RAILS_MASTER_KEY=${RAILS_MASTER_KEY}
 
 # Install the openstreetmap-website dependencies
 RUN apt-get update \