diff --git a/.github/workflows/ci-release.yml b/.github/workflows/ci-release.yml
index 89768a09..c03d12d3 100644
--- a/.github/workflows/ci-release.yml
+++ b/.github/workflows/ci-release.yml
@@ -30,6 +30,7 @@ jobs:
         continue-on-error: true
         uses: mamba-org/setup-micromamba@v1
         with:
+          micromamba-version: '1.5.10-0'
           environment-name: import_test
           create-args: >-
             python=${{ matrix.python-version }}
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 59b9f5cc..140762a2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -39,6 +39,7 @@ jobs:
         continue-on-error: true
         uses: mamba-org/setup-micromamba@v1
         with:
+          micromamba-version: '1.5.10-0'
           environment-file: build_envs/environment.yml
           cache-environment: true
           cache-environment-key: "CI ${{runner.os}}-${{runner.arch}}-py${{matrix.python-version}}-${{env.TODAY}}"
@@ -115,6 +116,7 @@ jobs:
         continue-on-error: true
         uses: mamba-org/setup-micromamba@v1
         with:
+          micromamba-version: '1.5.10-0'
           environment-file: build_envs/docs.yml
           cache-environment: true
           cache-environment-key: "linkcheck-${{env.TODAY}}"
diff --git a/.github/workflows/upstream-dev-ci.yml b/.github/workflows/upstream-dev-ci.yml
index 40955e65..c70a924f 100644
--- a/.github/workflows/upstream-dev-ci.yml
+++ b/.github/workflows/upstream-dev-ci.yml
@@ -31,6 +31,7 @@ jobs:
         continue-on-error: true
         uses: mamba-org/setup-micromamba@v1
         with:
+          micromamba-version: '1.5.10-0'
           environment-file: build_envs/environment.yml
           create-args: >-
             python=${{ matrix.python-version }}
diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index 73103aab..62bebe46 100644
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -22,6 +22,7 @@ Internal Changes
 * Updates to issue and PR templates by `Anissa Zacharias`_ in (:pr:`612`)
 * Re-pin ASV and list env info by `Katelyn FitzGerald`_ in (:pr:`613`)
 * Refactor ``pre-commit.ci`` by `Anissa Zacharias`_ in (:pr:`628`)
+* Temporarily pin micromamba for CI by `Anissa Zacharias`_ in (:pr:`645`)
 
 v2024.04.0 (April 23, 2024)
 ---------------------------