diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c82d5129f..1e69dfd70 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -32,7 +32,6 @@ jobs:
     - name: setup micromamba
       uses: mamba-org/setup-micromamba@v2
       with:
-         micromamba-version: '1.5.10-0'
          environment-name: geocat-examples
          environment-file: conda_environment.yml
          cache-environment: true
diff --git a/.github/workflows/upstream-dev-ci.yml b/.github/workflows/upstream-dev-ci.yml
index 50698c088..0d73a9d6a 100644
--- a/.github/workflows/upstream-dev-ci.yml
+++ b/.github/workflows/upstream-dev-ci.yml
@@ -27,7 +27,6 @@ jobs:
       - name: set up environment
         uses: mamba-org/setup-micromamba@v2
         with:
-          micromamba-version: '1.5.10-0'
           environment-file: conda_environment.yml
           create-args: >-
             python=${{ matrix.python-version }}