diff --git a/.github/workflows/ci-otapi3.yml b/.github/workflows/ci-otapi3.yml
index 7e02f47d..338b8ace 100644
--- a/.github/workflows/ci-otapi3.yml
+++ b/.github/workflows/ci-otapi3.yml
@@ -8,6 +8,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+        with:
+          submodules: 'recursive'
 
       - uses: actions/setup-dotnet@v1
         with:
@@ -27,6 +29,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+        with:
+          submodules: 'recursive'
 
       - uses: actions/setup-dotnet@v1
         with: