diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 259502b..76d11ae 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,6 +29,8 @@ jobs:
     steps:
       - name: Checkout sources
         uses: actions/checkout@v2
+        with:
+          submodules: 'recursive'
 
       - name: Install toolchain
         id: tc