diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 683f7b8f7f6704af865ba93034b695c566bef0c1..996c68735483c684ad7814a190dcb26dfa258258 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,3 +1,5 @@
+variables:
+  GIT_SUBMODULE_STRATEGY: recursive
 stages:
     - build
 compile_pdf: