diff --git a/.github/workflows/basic.yml b/.github/workflows/basic.yml
index f64d5e700db..c78f5d98d52 100644
--- a/.github/workflows/basic.yml
+++ b/.github/workflows/basic.yml
@@ -77,7 +77,7 @@ jobs:
     - uses: actions/checkout@v4
     - name: Fail-fast for outdated pipelines
       run: .github/workflows/fail-fast.sh
-    - uses: mamba-org/setup-micromamba@v2
+    - uses: conda-incubator/setup-miniconda@v3
       with:
         environment-file: environment.yml
 
diff --git a/.github/workflows/cvmfs.yml b/.github/workflows/cvmfs.yml
index 2242598fefb..6f7b6c99cad 100644
--- a/.github/workflows/cvmfs.yml
+++ b/.github/workflows/cvmfs.yml
@@ -7,10 +7,8 @@ jobs:
   deploy_CVMFS:
     runs-on: "ubuntu-latest"
     steps:
-      - uses: mamba-org/setup-micromamba@v2
+      - uses: conda-incubator/setup-miniconda@v3
         with:
-
-          mamba-version: "*"
           channels: conda-forge,defaults
           channel-priority: true
       - name: Deploy on CVMFS
diff --git a/.github/workflows/deployment.yml b/.github/workflows/deployment.yml
index b0733674ad0..b78a8cbc55d 100644
--- a/.github/workflows/deployment.yml
+++ b/.github/workflows/deployment.yml
@@ -132,10 +132,8 @@ jobs:
     if: github.event_name == 'workflow_dispatch'
     needs: deploy-pypi
     steps:
-      - uses: mamba-org/setup-micromamba@v2
+      - uses: conda-incubator/setup-miniconda@v3
         with:
-
-          mamba-version: "*"
           channels: conda-forge,defaults
           channel-priority: true
       - name: Deploy on CVMFS
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index f841c92ea04..63d30735921 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -1,6 +1,6 @@
 version: 2
 build:
-  os: ubuntu-20.04
+  os: ubuntu-24.04
   tools:
     python: mambaforge-4.10
 sphinx: