diff --git a/.github/workflows/page.yml b/.github/workflows/page.yml
index bfb8de39..e00d6422 100644
--- a/.github/workflows/page.yml
+++ b/.github/workflows/page.yml
@@ -30,16 +30,16 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup Ruby
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@8575951200e472d5f2d95c625da0c7bec8217c42
         with:
           ruby-version: '3.1' # Not needed with a .ruby-version file
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically
-          cache-version: 0 # Increment this number if you need to re-download cached gems
+          cache-version: 1 # Increment this number if you need to re-download cached gems
       - name: Setup Pages
         id: pages
-        uses: actions/configure-pages@v2
+        uses: actions/configure-pages@v5
       - name: Build with Jekyll
         # Outputs to the './_site' directory by default
         run: bundle exec jekyll build --baseurl "${{ steps.pages.outputs.base_path }}"
@@ -47,7 +47,7 @@ jobs:
           JEKYLL_ENV: production
       - name: Upload artifact
         # Automatically uploads an artifact from the './_site' directory by default
-        uses: actions/upload-pages-artifact@v1
+        uses: actions/upload-pages-artifact@v3
 
   # Deployment job
   deploy:
@@ -59,4 +59,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v1
+        uses: actions/deploy-pages@v4
diff --git a/Gemfile b/Gemfile
index f94e5ba8..6bae3d60 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,7 @@
 source 'https://rubygems.org'
-gem "github-pages", "~> 228", group: :jekyll_plugins
+gem "github-pages", "231", group: :jekyll_plugins
 gem "just-the-docs", "0.4.2" 
 gem "webrick"
 gem "rake"
+gem "jekyll", "3.9.5"
 gem "html-proofer", git: "https://github.com/jonasViehweger/html-proofer"
diff --git a/sentinel-2/markuse_fire/README.md b/sentinel-2/markuse_fire/README.md
index 8590dbad..442351b0 100644
--- a/sentinel-2/markuse_fire/README.md
+++ b/sentinel-2/markuse_fire/README.md
@@ -42,6 +42,4 @@ Wildfire east of Split, Croatia. Acquired on 17.7.2017.
 ![Fires in Sibiria, Russia.](fig/2020-06-28-Sibiria_fires.jpg)
 
 ## References
-[1] P. Markuse, <a href="https://web.archive.org/web/20230709082534/https://pierre-markuse.net/2022/09/21/quickfire-1-0-visualizing-fires-in-the-sentinel-hub-eo-browser/" target="_blank">QuickFire 1.0 – Visualizing Fires in the Sentinel Hub EO Browser</a>  
-[2] P. Markuse, <a href="https://web.archive.org/web/20230206114533/https://pierre-markuse.net/2017/08/07/visualizing-wildfires-sentinel-2-imagery-eo-browser/" target="_blank">Visualizing (Wild)Fires in Sentinel-2 imagery through EO Browser</a>  
-[3] P. Markuse, [Visualizing Wildfires and Burn Scars with the Sentinel Hub EO Browser V2](https://github.com/sentinel-hub/custom-scripts/blob/master/sentinel-2/markuse_fire/script.js){:target="_blank"}, May 2018
+