diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 523d51724..d79d7ca6a 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -225,7 +225,7 @@ jobs:
             repo.anaconda.com:443
       - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b # v4.1.5
       - name: Setup Conda (Micromamba) with Python${{ matrix.python-version }}
-        uses: mamba-org/setup-micromamba@422500192359a097648154e8db4e39bdb6c6eed7 # v1.8.1
+        uses: mamba-org/setup-micromamba@f8b8a1e23a26f60a44c853292711bacfd3eac822 # v1.9.0
         with:
           cache-downloads: true
           cache-environment: true
diff --git a/.github/workflows/upstream.yml b/.github/workflows/upstream.yml
index 6e20d5f0f..94b9bad6f 100644
--- a/.github/workflows/upstream.yml
+++ b/.github/workflows/upstream.yml
@@ -58,7 +58,7 @@ jobs:
         with:
           fetch-depth: 0 # Fetch all history for all branches and tags.
       - name: Setup Conda (Micromamba) with Python${{ 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