diff --git a/.github/workflows/base-ci.yml b/.github/workflows/base-ci.yml
index c73b454..a44a940 100644
--- a/.github/workflows/base-ci.yml
+++ b/.github/workflows/base-ci.yml
@@ -29,6 +29,9 @@ jobs:
     container: baoproject/bao:latest
     steps:
       - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+          submodules: recursive
       - run: |
           git config --global --add safe.directory $(realpath .)
           make spelling
@@ -48,4 +51,7 @@ jobs:
     container: baoproject/bao:latest
     steps:
       - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+          submodules: recursive
       - run: make html
diff --git a/bao-ci b/bao-ci
deleted file mode 160000
index 3003881..0000000
--- a/bao-ci
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 3003881da1cc447a484fd257690f248da68bd953