diff --git a/.github/workflows/conformance-tests.yml b/.github/workflows/conformance-tests.yml
index 6633449..9b5d35e 100644
--- a/.github/workflows/conformance-tests.yml
+++ b/.github/workflows/conformance-tests.yml
@@ -52,6 +52,7 @@ jobs:
         uses: actions/checkout@fbc6f3992d24b796d5a048ff273f7fcc4a7b6c09 # v5
         with:
           repository: Universal-Commerce-Protocol/python-sdk
+          ref: v2026-04-08-6
           path: python-sdk
 
       - name: Install uv