diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8f5ae723..bb383ef2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ defaults:
     shell: bash
 
 env:
-  hipo_version: dev
+  hipo_version: 4.0.1
   fmt_version: 9.1.0 # for Linux runners, whereas macOS uses Homebrew version
   num_events: 10
 
@@ -29,7 +29,7 @@ jobs:
       - name: checkout hipo
         uses: actions/checkout@v4
         with:
-          repository: c-dilks/hipo # FIXME: revert to gavalian
+          repository: gavalian/hipo
           ref: ${{ env.hipo_version }}
       - name: build
         run: |