diff --git a/update-gluon.sh b/update-gluon.sh
index 25189b7d00a0dfb8a3fc455f10e88cd3e21226b0..aab2145269e352ac793071443a8940562cb86c8e 100755
--- a/update-gluon.sh
+++ b/update-gluon.sh
@@ -42,6 +42,7 @@ git checkout nightly
 
 git -C gluon fetch
 git -C gluon checkout $new_gluon_rev
+git -C gluon submodule update
 
 git add gluon
 git commit -m "automatic update to gluon $fork_newest_minor_tag"