diff --git a/.github/workflows/ci-with-conda.yml b/.github/workflows/ci-with-conda.yml
index 8592f01..9daeca1 100644
--- a/.github/workflows/ci-with-conda.yml
+++ b/.github/workflows/ci-with-conda.yml
@@ -24,7 +24,8 @@ jobs:
         echo $CONDA/bin >> $GITHUB_PATH
     - name: Install dependencies
       run: |
-        conda env update --file mbarq_environment.yaml --name base
+        conda install mamba
+        mamba env update --file mbarq_environment.yaml --name base
     - name: Lint with flake8
       run: |
         conda install flake8