diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 7dcd92ad..1ad2164b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -83,7 +83,7 @@ jobs:
       - name: Checkout Repository
         uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4.1.6
       - name: Setup Conda (Micromamba) with Python ${{ matrix.python-version }}
-        uses: mamba-org/setup-micromamba@422500192359a097648154e8db4e39bdb6c6eed7 # v1.8.1
+        uses: mamba-org/setup-micromamba@f8b8a1e23a26f60a44c853292711bacfd3eac822 # v1.9.0
         with:
           cache-downloads: true
           environment-name: xscen-pypi
@@ -152,7 +152,7 @@ jobs:
       - name: Checkout Repository
         uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4.1.6
       - name: Setup Conda (Micromamba) with Python ${{ matrix.python-version }}
-        uses: mamba-org/setup-micromamba@422500192359a097648154e8db4e39bdb6c6eed7 # v1.8.1
+        uses: mamba-org/setup-micromamba@f8b8a1e23a26f60a44c853292711bacfd3eac822 # v1.9.0
         with:
           cache-downloads: true
           cache-environment: true
diff --git a/.github/workflows/upstream.yml b/.github/workflows/upstream.yml
index 402e2814..f2e85332 100644
--- a/.github/workflows/upstream.yml
+++ b/.github/workflows/upstream.yml
@@ -50,7 +50,7 @@ jobs:
         with:
           fetch-depth: 0 # Fetch all history for all branches and tags.
       - name: Setup Conda (Micromamba) with Python${{ matrix.python-version }}
-        uses: mamba-org/setup-micromamba@422500192359a097648154e8db4e39bdb6c6eed7 # v1.8.1
+        uses: mamba-org/setup-micromamba@f8b8a1e23a26f60a44c853292711bacfd3eac822 # v1.9.0
         with:
           cache-downloads: true
           cache-environment: true