diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index cef78614..1025fb54 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -97,6 +97,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+        with:
+          submodules: true
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: stable