diff --git a/.github/workflows/backend.yml b/.github/workflows/backend.yml
index 63a328fa41..1e7d05f93c 100644
--- a/.github/workflows/backend.yml
+++ b/.github/workflows/backend.yml
@@ -161,6 +161,7 @@ jobs:
             *.symcb.com:80
             api.nuget.org:443
             archive.ubuntu.com:80
+            auth.docker.io:443
             dc.services.visualstudio.com:443
             deb.debian.org:80
             github.com:443