diff --git a/external/docker-keeper/VERSION b/external/docker-keeper/VERSION
index 1e9b46b..6201b5f 100644
--- a/external/docker-keeper/VERSION
+++ b/external/docker-keeper/VERSION
@@ -1 +1 @@
-0.8.7
+0.8.8
diff --git a/external/docker-keeper/gitlab-ci-template.yml b/external/docker-keeper/gitlab-ci-template.yml
index 51476d8..bddb4ac 100644
--- a/external/docker-keeper/gitlab-ci-template.yml
+++ b/external/docker-keeper/gitlab-ci-template.yml
@@ -141,7 +141,7 @@ check-updates:
     cat <<EOF
     You need to update docker-keeper : $version -> $upstream, by doing:
       cd \$(git rev-parse --show-toplevel)
-      subtree pull --squash -P $KEEPER_SUBTREE $upstream_repo master
+      git subtree pull --squash -P $KEEPER_SUBTREE $upstream_repo master
     EOF
         false
       else