diff --git a/.cirrus.yml b/.cirrus.yml
index fd9ee1e..a868eeb 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -13,6 +13,8 @@ task:
       git fetch origin pull/$CIRRUS_PR/head:pull/$CIRRUS_PR
       git reset --hard $CIRRUS_CHANGE_IN_REPO
     fi
+    git submodule sync
+    git submodule update
 
   script: |
       mkdir Build