diff --git a/.github/workflows/ci-otapi3-nuget.yml b/.github/workflows/ci-otapi3-nuget.yml
index da790403..7d979bf0 100644
--- a/.github/workflows/ci-otapi3-nuget.yml
+++ b/.github/workflows/ci-otapi3-nuget.yml
@@ -12,6 +12,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
+      with:
+        submodules: 'recursive'
     - name: Setup .NET
       uses: actions/setup-dotnet@v2
       with: