diff --git a/.gitea/workflows/check.yml b/.gitea/workflows/check.yml
index edeb198..d92c4e7 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: 24c45920602378d52a42cda7e8ec2840864c8dbd
+          HEADLESS_CLIENT_REVISION: 15ee91772d01b0a5cebe9853a35da31da0c0e102
         run: |
           set -eu
           mkdir -p .headless-client