diff --git a/.gitea/workflows/check.yml b/.gitea/workflows/check.yml
index dcf3166..f7d153f 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: 580a14f508bc695bfed99d60c42f0d4df36b15b2
+          HEADLESS_CLIENT_REVISION: 26da326c18bdf5363c646dff87756590b29433ea
         run: |
           set -eu
           mkdir -p .headless-client