diff --git a/.github/workflows/oidc-conformity-master.yml b/.github/workflows/oidc-conformity-master.yml
index 796d3d859..a181dfbd6 100644
--- a/.github/workflows/oidc-conformity-master.yml
+++ b/.github/workflows/oidc-conformity-master.yml
@@ -20,7 +20,7 @@ jobs:
           go-version: '^1.16.0'
       - name: Update fosite
         run: |
-          go mod edit -replace github.com/ory/fosite=github.com/ory/fosite@${{ github.ref }}
+          go mod edit -replace github.com/ory/fosite=github.com/ory/fosite@${{ github.sha }}
           go mod tidy
       - name: Start service
         run: ./test/conformance/start.sh