diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1b97129..8488cb0 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -7,7 +7,8 @@ variables:
   IMAGE_NAME: $REGISTRY/$CI_PROJECT_NAME
   DTRACK_API_URL: https://dtrack-api-rd.krohne.com
   DEFECTDOJO_API_URL: https://defectdojo-rd.krohne.com
-
+  KROHNE_CA_URL: https://devwiki.krohnegroup.com/lib/exe/fetch.php?media=krohne-ca.crt
+  KROHNE_CA_CHECKSUM: a921e440a742f1e67c7714306e2c0d76
 
 .generate-api:
   stage: generate-api-clients
@@ -20,8 +21,8 @@ variables:
     - if: '$CI_COMMIT_BRANCH == "main"'
     - if: '$CI_COMMIT_TAG'
   before_script:
-    - curl --insecure https://devwiki.krohnegroup.com/lib/exe/fetch.php?media=krohne-ca.crt -o krohne-ca.crt
-    - echo "a921e440a742f1e67c7714306e2c0d76  krohne-ca.crt" | md5sum -c 
+    - curl --insecure $KROHNE_CA_URL -o krohne-ca.crt
+    - echo "$KROHNE_CA_CHECKSUM  krohne-ca.crt" | md5sum -c 
     - mv krohne-ca.crt /usr/local/share/ca-certificates
     - update-ca-certificates
 
@@ -84,6 +85,8 @@ dockerize:
     - docker build --tag $IMAGE_NAME:latest 
                    --tag $IMAGE_NAME:$CI_COMMIT_SHA
                    --tag $IMAGE_NAME:$CI_COMMIT_TAG
+                   --build-arg "CUSTOM_CA_URL=$KROHNE_CA_URL"
+                   --build-arg "CUSTOM_CA_CHECKSUM=$KROHNE_CA_CHECKSUM"
                    .
     - docker login -u $NEXUS_USER -p $NEXUS_PASSWORD $REGISTRY
     - docker push $IMAGE_NAME:latest