diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 188958d..bdd0a59 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -34,7 +34,7 @@ jobs:
         run: |
           git submodule update --init --recursive
           pushd ref/bolero
-          git checkout master
+          git checkout $BOLERO_BRANCH
           git pull
           ./build.ps1 -t build -c Debug
           popd
@@ -53,3 +53,6 @@ jobs:
           destination-repository-name: fsbolero.github.io
           user-email: bolero@fsbolero.io
           target-branch: master
+
+env:
+  BOLERO_BRANCH: releases/v0.22