diff --git a/.gitea/workflows/check.yml b/.gitea/workflows/check.yml
index a01c27b..fa464f1 100644
--- a/.gitea/workflows/check.yml
+++ b/.gitea/workflows/check.yml
@@ -71,7 +71,7 @@ jobs:
           PYSLACK
       - name: Fetch pinned headless HTTP integration client
         env:
-          HEADLESS_CLIENT_REVISION: 6ec6b120742e81be011b93f8986d894744cb7deb
+          HEADLESS_CLIENT_REVISION: 5b35519562823175b73243cc5b0eb6b01a541a30
         run: |
           set -eu
           mkdir -p .headless-client