diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9fb8175..d3ee254 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,7 @@
-image: node:13.5-buster
+image: ubuntu:bionic
+
+variables:
+  GIT_SUBMODULE_STRATEGY: recursive
 
 stages:
   - orthography