diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index ab23791..76e03e8 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -13,7 +13,7 @@ jobs:
       fail-fast: true
       matrix:
         os: ["windows-latest", "ubuntu-latest", "macos-latest"]
-        python-version: ["3.9", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
         experimental: [false]
         include:
           - python-version: "3.12"
@@ -33,11 +33,12 @@ jobs:
       - name: Setup Conda Environment
         uses: conda-incubator/setup-miniconda@v3
         with:
-          miniforge-variant: Mambaforge
           miniforge-version: latest
-          use-mamba: true
           python-version: ${{ matrix.python-version }}
           activate-environment: test-environment
+          channels: conda-forge
+          conda-remove-defaults: true
+          channel-priority: strict
 
       - name: Set cache environment variables
         shell: bash -l {0}