diff --git a/.github/workflows/hitl_trigger.yml b/.github/workflows/hitl_trigger.yml
index b108ba6..b0fafac 100644
--- a/.github/workflows/hitl_trigger.yml
+++ b/.github/workflows/hitl_trigger.yml
@@ -30,7 +30,7 @@ jobs:
           event-type: stabilizer
           repository: quartiq/hitl
           client-payload: |
-            '{"github": ${{ toJson(github) }}, "check_id": ${{steps.hitl-check.outputs.check_id}}}'
+            {"github": ${{ toJson(github) }}, "check_id": ${{steps.hitl-check.outputs.check_id}}}
 
       - uses: fountainhead/action-wait-for-check@v1.0.0
         with: