diff --git a/.github/workflows/upstream-dev-ci.yaml b/.github/workflows/upstream-dev-ci.yaml
index 3fdb1e4c..6cfd66d8 100644
--- a/.github/workflows/upstream-dev-ci.yaml
+++ b/.github/workflows/upstream-dev-ci.yaml
@@ -56,7 +56,7 @@ jobs:
         with:
           fetch-depth: 0 # Fetch all history for all branches and tags.
       - name: Set up conda environment
-        uses: mamba-org/provision-with-micromamba@34071ca7df4983ccd272ed0d3625818b27b70dcc
+        uses: mamba-org/provision-with-micromamba@a319a818023c3a5a448a60bd72e0c633408fbccc
         with:
           environment-file: ci/upstream-dev-env.yml
           environment-name: cf_xarray_test