diff --git a/.github/workflows/on-pr.yml b/.github/workflows/on-pr.yml
index c9d3fe6..259788e 100644
--- a/.github/workflows/on-pr.yml
+++ b/.github/workflows/on-pr.yml
@@ -25,7 +25,7 @@ on:
       - "**"
 
 env:
-  stack-orchestrator-ref: ${{ github.event.inputs.stack-orchestrator-ref  || 'feature/client-build'}}
+  stack-orchestrator-ref: ${{ github.event.inputs.stack-orchestrator-ref  || 'main'}}
   ipld-ethcl-db-ref: ${{ github.event.inputs.ipld-ethcl-db-ref  || 'feature/schema-ipld-ethcl-indexer' }}
   ssz-data-ref: ${{ github.event.inputs.ssz-data-ref  || 'main' }}
   GOPATH: /tmp/go