diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 33ecfca..b65a4b4 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -41,6 +41,7 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
+      submodule: true
     - uses: dtolnay/rust-toolchain@master
       with:
         toolchain: ${{ matrix.rust }}