diff --git a/.github/workflows/default-tests.yml b/.github/workflows/default-tests.yml
index 30a609da..58bc860e 100644
--- a/.github/workflows/default-tests.yml
+++ b/.github/workflows/default-tests.yml
@@ -20,7 +20,7 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Setup Micromamba ${{ matrix.python-version }}
-      uses: mamba-org/setup-micromamba@v2
+      uses: mamba-org/setup-micromamba@v2.0.0
       with:
         environment-name: TEST
         init-shell: bash