diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index a76553c..87cb75e 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -27,6 +27,8 @@ jobs:
             target: aarch64
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: recursive
       - uses: actions/setup-python@v5
         with:
           python-version: 3.x
@@ -57,6 +59,8 @@ jobs:
             target: aarch64
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: recursive
       - uses: actions/setup-python@v5
         with:
           python-version: 3.x
@@ -85,6 +89,8 @@ jobs:
             target: x86
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: recursive
       - uses: actions/setup-python@v5
         with:
           python-version: 3.x
@@ -113,6 +119,8 @@ jobs:
             target: aarch64
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: recursive
       - uses: actions/setup-python@v5
         with:
           python-version: 3.x
@@ -133,6 +141,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: recursive
       - name: Build sdist
         uses: PyO3/maturin-action@v1
         with: