diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 451df8a..2058f2d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,3 +1,6 @@
+variables:
+  GIT_SUBMODULE_STRATEGY: recursive
+
 compile_pdf:
   image: latexpygments
   script: