diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cd472fb..f859ae7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -53,7 +53,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           repository: augustss/MicroHs
-          ref: v0.14.15.0
+          ref: v0.15.4.0
           path: mhs
 
       - name: make and install mhs
@@ -70,4 +70,4 @@ jobs:
         run: |
           PATH="$HOME/.mcabal/bin:$PATH"
           cd transformers
-          mcabal install
+          mcabal -r install