diff --git a/createrepo.sh b/createrepo.sh
index 1aba82b..5af2c1d 100644
--- a/createrepo.sh
+++ b/createrepo.sh
@@ -4,10 +4,7 @@ set -e
 
 CONTAINER_RUNTIME=$(which docker)
 
-CREATEREPO_IMAGE_REGISTRY_HOST=docker.io
-CREATEREPO_IMAGE_NAME=volkerraschek/createrepo
-CREATEREPO_IMAGE_VERSION=0.17.1
-CREATEREPO_IMAGE_FULLY_QUALIFIED=${CREATEREPO_IMAGE_REGISTRY_HOST}/${CREATEREPO_IMAGE_NAME}:${CREATEREPO_IMAGE_VERSION}
+CREATEREPO_IMAGE_FULLY_QUALIFIED=docker.io/volkerraschek/createrepo:0.17.1
 
 CUSTOM_UID=$(getent passwd ${USER} | cut -d ':' -f 3)
 CUSTOM_GID=$(getent passwd ${USER} | cut -d ':' -f 4)
diff --git a/renovate.json b/renovate.json
index 6e6f887..6a57c1a 100644
--- a/renovate.json
+++ b/renovate.json
@@ -27,8 +27,7 @@
         "^createrepo.sh$"
       ],
       "matchStrings": [
-        "^CREATEREPO_IMAGE_NAME=(?<depName>.*)$",
-        "^CREATEREPO_IMAGE_VERSION=(?<currentValue>.*)$"
+        "^CREATEREPO_IMAGE_FULLY_QUALIFIED=(?<depName>.*):(?<currentValue>.*)$"
       ],
       "datasourceTemplate": "docker"
     }