diff --git a/.github/workflows/repo2docker.yml b/.github/workflows/repo2docker.yml
index 5cea350..3040159 100644
--- a/.github/workflows/repo2docker.yml
+++ b/.github/workflows/repo2docker.yml
@@ -3,7 +3,7 @@ name: Validator
 
 on:
   pull_request:
-    branches: [ main ]
+    branches: [main]
 
 jobs:
   repo2docker:
@@ -12,12 +12,14 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
 
       - name: Setup Miniconda
-        uses: conda-incubator/setup-miniconda@v2
+        uses: conda-incubator/setup-miniconda@835234971496cad1653abb28a638a281cf32541f # v3.2.0
         with:
-          channels: conda-forge
+          conda-remove-defaults: "true"
+          conda-solver: libmamba
+          miniforge-version: latest
 
       - name: Install dependencies
         shell: bash -l {0}
diff --git a/README.md b/README.md
index 34258bd..26d4198 100644
--- a/README.md
+++ b/README.md
@@ -8,10 +8,10 @@ versions installed.
 
 Run it online by clicking on one of the badges below:
 
-- [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/GenericMappingTools/try-gmt/main?urlpath=lab/tree/landing-page.ipynb) hosted at https://mybinder.org/
-- [![Binder](https://mybinder.org/badge_logo.svg)](https://ovh.mybinder.org/v2/gh/GenericMappingTools/try-gmt/main?urlpath=lab/tree/landing-page.ipynb) hosted at https://ovh.mybinder.org/
-- [![Binder](https://mybinder.org/badge_logo.svg)](https://notebooks.gesis.org/binder/v2/gh/GenericMappingTools/try-gmt/main?urlpath=lab/tree/landing-page.ipynb) hosted at https://notebooks.gesis.org/binder/
-- [![Binder](https://mybinder.org/badge_logo.svg)](https://binder.curvenote.dev/v2/gh/GenericMappingTools/try-gmt/main?urlpath=lab/tree/landing-page.ipynb) hosted at https://binder.curvenote.dev/
+- [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/GenericMappingTools/try-gmt/main?urlpath=%2Fdoc%2Ftree%2Flanding-page.ipynb) hosted at https://mybinder.org/
+- [![Binder](https://2i2c.mybinder.org/badge_logo.svg)](https://2i2c.mybinder.org/v2/gh/GenericMappingTools/try-gmt/main?urlpath=%2Fdoc%2Ftree%2Flanding-page.ipynb) hosted at https://2i2c.mybinder.org/
+- [![Binder](https://bids.mybinder.org/badge_logo.svg)](https://bids.mybinder.org/v2/gh/GenericMappingTools/try-gmt/main?urlpath=%2Fdoc%2Ftree%2Flanding-page.ipynb) hosted at https://bids.mybinder.org/
+- [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/GenericMappingTools/try-gmt/main?urlpath=%2Fdoc%2Ftree%2Flanding-page.ipynb) hosted at https://notebooks.gesis.org/binder/
 - [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/GenericMappingTools/try-gmt/blob/main/landing-page.ipynb) hosted by [Google Colab](https://colab.research.google.com/) (Need to log in to your Google account).
 
 ## Installed packages