diff --git a/.github/workflows/commit.yml b/.github/workflows/commit.yml
index c831e2f28..64eab8078 100644
--- a/.github/workflows/commit.yml
+++ b/.github/workflows/commit.yml
@@ -144,7 +144,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup Micromamba
-        uses: mamba-org/setup-micromamba@v2
+        uses: mamba-org/setup-micromamba@v1
         with:
           environment-file: etc/environment.yml
           cache-environment: true
diff --git a/.github/workflows/rtd.yml b/.github/workflows/rtd.yml
index a342ebcb6..b12988912 100644
--- a/.github/workflows/rtd.yml
+++ b/.github/workflows/rtd.yml
@@ -80,7 +80,7 @@ jobs:
           echo $GITHUB_EVENT_NAME
 
       - name: Setup Micromamba
-        uses: mamba-org/setup-micromamba@v2
+        uses: mamba-org/setup-micromamba@v1
         with:
           environment-file: etc/environment.yml
           cache-environment: true