diff --git a/.github/workflows/run_e2e.yml b/.github/workflows/run_e2e.yml
index 3c1c8be91..030b61707 100644
--- a/.github/workflows/run_e2e.yml
+++ b/.github/workflows/run_e2e.yml
@@ -30,7 +30,7 @@ jobs:
           workflow: e2e_tests.yml
           # https://github.com/Codex-/return-dispatch/issues/203
           workflow_inputs: >
-            '{"control-api": "${{ inputs.image_version }}", "data-api": "${{ inputs.image_version }}"}'
+            {"control-api": "${{ inputs.image_version }}", "data-api": "${{ inputs.image_version }}"}
           workflow_timeout_seconds: ${{ env.TIMEOUT }}
 
       - name: Output the run URL