diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
index 4d662a6..c679c55 100644
--- a/.github/workflows/unittest.yml
+++ b/.github/workflows/unittest.yml
@@ -15,7 +15,7 @@ jobs:
         shell: bash -l {0}
     steps:
       - uses: actions/checkout@v4
-      - uses: mamba-org/setup-micromamba@v1
+      - uses: mamba-org/setup-micromamba@v2
         with:
           environment-file: environment.yml
           cache-environment-key: ${{ runner.os }}-env-${{ hashFiles('**/environment.yml') }}