diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9a12409..fdbd666 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,14 +15,14 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
 
-     - uses: mamba-org/setup-micromamba@v1
-       with:
-         environment-file: .github/environment.yml
-         init-shell: >-
-           bash
-           powershell
-         cache-environment: true
-         post-cleanup: 'all'
+      - uses: mamba-org/setup-micromamba@v1
+        with:
+          environment-file: .github/environment.yml
+          init-shell: >-
+            bash
+            powershell
+          cache-environment: true
+          post-cleanup: 'all'
 
       - name: Install OpenMC
         shell: bash
@@ -40,4 +40,4 @@ jobs:
 
       - name: Setup tmate session
         if: ${{ failure() }}
-        uses: mxschmitt/action-tmate@v3
\ No newline at end of file
+        uses: mxschmitt/action-tmate@v3