diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cc7965ad29..24c34429c1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -343,7 +343,9 @@ jobs:
   desktop-e2e-relay:
     name: Desktop E2E Relay
     runs-on: ubuntu-latest
-    timeout-minutes: 30
+    # Cold builds can exceed 30 minutes when agent dependency changes invalidate
+    # the shared workspace cache before relay artifacts are produced.
+    timeout-minutes: 45
     needs: [changes]
     if: github.event_name == 'push' || needs.changes.outputs.desktop == 'true' || needs.changes.outputs.desktop-rust == 'true' || needs.changes.outputs.rust == 'true'
     permissions: