diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index dad62edf46..c6c2800b9e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -52,6 +52,9 @@ jobs:
       - name: Set up Bundler
         run: gem install bundler -v "~> 1.17"
 
+      - name: Update rubygems
+        run: gem update --system
+
       - run: ruby --version
       - run: gem --version
       - run: bundle --version
diff --git a/.gitignore b/.gitignore
index fd07f09e03..ecef861f83 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 # Ignore docs files
 /_gh_pages/
+/site/.jekyll-cache
 /site/.jekyll-metadata
 /site/docs/**/dist/
 # Hugo folders
diff --git a/Gemfile b/Gemfile
index 76554522b2..13dfc6847e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
 group :development, :test do
-  gem 'jekyll', '~> 3.8.6'
+  gem 'jekyll', '~> 4.0.0'
   gem 'jekyll-redirect-from', '~> 0.16.0'
   gem 'jekyll-sitemap', '~> 1.4.0'
   gem 'jekyll-toc', '~> 0.13.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index bdac4289b6..b275163a7a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -14,25 +14,27 @@ GEM
     ffi (1.12.2-x64-mingw32)
     forwardable-extended (2.6.0)
     http_parser.rb (0.6.0)
-    i18n (0.9.5)
+    i18n (1.8.2)
       concurrent-ruby (~> 1.0)
-    jekyll (3.8.6)
+    jekyll (4.0.0)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
-      i18n (~> 0.7)
-      jekyll-sass-converter (~> 1.0)
+      i18n (>= 0.9.5, < 2)
+      jekyll-sass-converter (~> 2.0)
       jekyll-watch (~> 2.0)
-      kramdown (~> 1.14)
+      kramdown (~> 2.1)
+      kramdown-parser-gfm (~> 1.0)
       liquid (~> 4.0)
       mercenary (~> 0.3.3)
       pathutil (~> 0.9)
-      rouge (>= 1.7, < 4)
+      rouge (~> 3.0)
       safe_yaml (~> 1.0)
+      terminal-table (~> 1.8)
     jekyll-redirect-from (0.16.0)
       jekyll (>= 3.3, < 5.0)
-    jekyll-sass-converter (1.5.2)
-      sass (~> 3.4)
+    jekyll-sass-converter (2.1.0)
+      sassc (> 2.0.1, < 3.0)
     jekyll-sitemap (1.4.0)
       jekyll (>= 3.7, < 5.0)
     jekyll-toc (0.13.1)
@@ -40,7 +42,9 @@ GEM
       nokogiri (~> 1.9)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    kramdown (1.17.0)
+    kramdown (2.1.0)
+    kramdown-parser-gfm (1.1.0)
+      kramdown (~> 2.0)
     liquid (4.0.3)
     listen (3.2.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
@@ -59,11 +63,13 @@ GEM
       ffi (~> 1.0)
     rouge (3.16.0)
     safe_yaml (1.0.5)
-    sass (3.7.4)
-      sass-listen (~> 4.0.0)
-    sass-listen (4.0.0)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
+    sassc (2.2.1)
+      ffi (~> 1.9)
+    sassc (2.2.1-x64-mingw32)
+      ffi (~> 1.9)
+    terminal-table (1.8.0)
+      unicode-display_width (~> 1.1, >= 1.1.1)
+    unicode-display_width (1.6.1)
     wdm (0.1.1)
 
 PLATFORMS
@@ -71,7 +77,7 @@ PLATFORMS
   x64-mingw32
 
 DEPENDENCIES
-  jekyll (~> 3.8.6)
+  jekyll (~> 4.0.0)
   jekyll-redirect-from (~> 0.16.0)
   jekyll-sitemap (~> 1.4.0)
   jekyll-toc (~> 0.13.1)