diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index 8666461..d295d5a 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -15,6 +15,8 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           toolchain: nightly
+      - name: Fetch submodules
+        run: git submodule update --init
       - name: Install cargo udeps
         run: cargo install cargo-udeps --locked
       - name: Execute cargo udeps