diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 3d21508c..5585897c 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -70,7 +70,7 @@ jobs:
     - uses: actions/checkout@v3
 
     - name: micromamba environment and package installation (Python ${{ matrix.python-version }})
-      uses: mamba-org/setup-micromamba@v1
+      uses: mamba-org/setup-micromamba@v1.4.4
       with:
         environment-file: ci/conda-envs/test_env.yaml
         condarc: |