diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index bcfdb27..3daa452 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -29,7 +29,7 @@ jobs:
       - name: Setup Mill
         uses: jodersky/setup-mill@v0.2.3
         with:
-          mill-version: 0.9.8
+          mill-version: 0.11.1
 
       - name: builtin-chiseltest
         run: |