diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9dbeb74..50cf4b2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -43,6 +43,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+        with:
+          submodules: true
 
       - uses: actions-rs/toolchain@v1
         with: