diff --git a/helper-scripts/_cold-standby.sh b/helper-scripts/_cold-standby.sh
index e2e5f1556..9e7362ec6 100755
--- a/helper-scripts/_cold-standby.sh
+++ b/helper-scripts/_cold-standby.sh
@@ -10,46 +10,6 @@ echo "If this script is run automatically by cron or a timer AND you are using b
 echo "The snapshots of your backup destination should run AFTER the cold standby script finished to ensure consistent snapshots."
 echo
 
-function docker_garbage() {
-  IMGS_TO_DELETE=()
-
-  for container in $(grep -oP "image: \Kmailcow.+" docker-compose.yml); do
-
-    REPOSITORY=${container/:*}
-    TAG=${container/*:}
-    V_MAIN=${container/*.}
-    V_SUB=${container/*.}
-    EXISTING_TAGS=$(docker images | grep ${REPOSITORY} | awk '{ print $2 }')
-
-    for existing_tag in ${EXISTING_TAGS[@]}; do
-
-      V_MAIN_EXISTING=${existing_tag/*.}
-      V_SUB_EXISTING=${existing_tag/*.}
-
-      # Not an integer
-      [[ ! ${V_MAIN_EXISTING} =~ ^[0-9]+$ ]] && continue
-      [[ ! ${V_SUB_EXISTING} =~ ^[0-9]+$ ]] && continue
-
-      if [[ ${V_MAIN_EXISTING} == "latest" ]]; then
-        echo "Found deprecated label \"latest\" for repository ${REPOSITORY}, it should be deleted."
-        IMGS_TO_DELETE+=(${REPOSITORY}:${existing_tag})
-      elif [[ ${V_MAIN_EXISTING} -lt ${V_MAIN} ]]; then
-        echo "Found tag ${existing_tag} for ${REPOSITORY}, which is older than the current tag ${TAG} and should be deleted."
-        IMGS_TO_DELETE+=(${REPOSITORY}:${existing_tag})
-      elif [[ ${V_SUB_EXISTING} -lt ${V_SUB} ]]; then
-        echo "Found tag ${existing_tag} for ${REPOSITORY}, which is older than the current tag ${TAG} and should be deleted."
-        IMGS_TO_DELETE+=(${REPOSITORY}:${existing_tag})
-      fi
-
-    done
-
-  done
-
-  if [[ ! -z ${IMGS_TO_DELETE[*]} ]]; then
-    docker rmi ${IMGS_TO_DELETE[*]}
-  fi
-}
-
 function preflight_local_checks() {
   if [[ -z "${REMOTE_SSH_KEY}" ]]; then
     >&2 echo -e "\e[31mREMOTE_SSH_KEY is not set\e[0m"
diff --git a/update.sh b/update.sh
index 9cfb02fd1..27972e82a 100755
--- a/update.sh
+++ b/update.sh
@@ -36,13 +36,23 @@ docker_garbage() {
   IMGS_TO_DELETE=()
 
   declare -A IMAGES_INFO
-  COMPOSE_IMAGES=($(grep -oP "image: \Kmailcow.+" "${SCRIPT_DIR}/docker-compose.yml"))
+  # Erfasse alle in docker-compose verwendeten Images (sowohl mailcow/... als auch ghcr.io/mailcow/...)
+  COMPOSE_IMAGES=($(grep -oP "image: \K(ghcr\.io/)?mailcow.+" "${SCRIPT_DIR}/docker-compose.yml"))
 
-  for existing_image in $(docker images --format "{{.ID}}:{{.Repository}}:{{.Tag}}" | grep 'mailcow/'); do
+  # Durchlaufe alle vorhandenen Images, die mailcow/ oder ghcr.io/mailcow/ beinhalten
+  for existing_image in $(docker images --format "{{.ID}}:{{.Repository}}:{{.Tag}}" | grep -E '(mailcow/|ghcr\.io/mailcow/)'); do
       ID=$(echo "$existing_image" | cut -d ':' -f 1)
       REPOSITORY=$(echo "$existing_image" | cut -d ':' -f 2)
       TAG=$(echo "$existing_image" | cut -d ':' -f 3)
 
+      # Für das Image mailcow/backup: nur löschen, wenn es untagged ist (TAG gleich "<none>")
+      if [[ "$REPOSITORY" == "mailcow/backup" || "$REPOSITORY" == "ghcr.io/mailcow/backup" ]]; then
+          if [[ "$TAG" != "<none>" ]]; then
+              continue
+          fi
+      fi
+
+      # Überspringe Images, die in der docker-compose.yml verwendet werden
       if [[ " ${COMPOSE_IMAGES[@]} " =~ " ${REPOSITORY}:${TAG} " ]]; then
           continue
       else
@@ -57,7 +67,7 @@ docker_garbage() {
           echo "    ${IMAGES_INFO[$id]} ($id)"
       done
 
-      if [ ! $FORCE ]; then
+      if [ -z "$FORCE" ]; then
           read -r -p "Do you want to delete them to free up some space? [y/N] " response
           if [[ "$response" =~ ^([yY][eE][sS]|[yY])+$ ]]; then
               docker rmi ${IMGS_TO_DELETE[*]}