diff --git a/Gemfile b/Gemfile
index 2f27c87fa727..ff48da2cb2c4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -13,7 +13,7 @@ end
 group :jekyll_plugins do
   gem 'jekyll-paginate', '1.1.0'
   gem 'jekyll-redirect-from', '0.15.0'
-  gem 'jekyll-sitemap', '1.3.1'
+  gem 'jekyll-sitemap', '1.4.0'
   gem 'jekyll-time-to-read', '0.1.2'
   gem 'jekyll-commonmark', '1.3.1'
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index baa5809420aa..1aec6c61832c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.7.0)
+    addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
     chunky_png (1.3.11)
     colorator (1.1.0)
@@ -19,15 +19,15 @@ GEM
       sass (>= 3.3.0, < 3.5)
     compass-import-once (1.0.5)
       sass (>= 3.2, < 3.5)
-    concurrent-ruby (1.1.5)
-    em-websocket (0.5.1)
+    concurrent-ruby (1.1.9)
+    em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
-      http_parser.rb (~> 0.6.0)
+      http_parser.rb (~> 0)
     eventmachine (1.2.7)
-    ffi (1.11.1)
+    ffi (1.15.5)
     forwardable-extended (2.6.0)
-    http_parser.rb (0.6.0)
-    i18n (1.6.0)
+    http_parser.rb (0.8.0)
+    i18n (1.10.0)
       concurrent-ruby (~> 1.0)
     jekyll (4.0.0)
       addressable (~> 2.4)
@@ -50,22 +50,22 @@ GEM
     jekyll-paginate (1.1.0)
     jekyll-redirect-from (0.15.0)
       jekyll (>= 3.3, < 5.0)
-    jekyll-sass-converter (2.0.0)
+    jekyll-sass-converter (2.2.0)
       sassc (> 2.0.1, < 3.0)
-    jekyll-sitemap (1.3.1)
+    jekyll-sitemap (1.4.0)
       jekyll (>= 3.7, < 5.0)
     jekyll-time-to-read (0.1.2)
       jekyll
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    kramdown (2.1.0)
+    kramdown (2.3.1)
+      rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
     liquid (4.0.3)
-    listen (3.1.5)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
-      ruby_dep (~> 1.2)
+    listen (3.7.1)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
     mini_portile2 (2.4.0)
     multi_json (1.13.1)
@@ -74,23 +74,23 @@ GEM
       mini_portile2 (~> 2.4.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.1)
+    public_suffix (4.0.6)
     rack (2.0.7)
     rack-protection (2.0.7)
       rack
     rake (12.3.3)
-    rb-fsevent (0.10.3)
-    rb-inotify (0.10.0)
+    rb-fsevent (0.11.1)
+    rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rouge (3.9.0)
+    rexml (3.2.5)
+    rouge (3.28.0)
     ruby-enum (0.7.2)
       i18n
-    ruby_dep (1.5.0)
     safe_yaml (1.0.5)
     sass (3.4.25)
     sass-globbing (1.1.5)
       sass (>= 3.1)
-    sassc (2.2.0)
+    sassc (2.4.0)
       ffi (~> 1.9)
     sinatra (2.0.7)
       mustermann (~> 1.0)
@@ -101,7 +101,7 @@ GEM
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     tilt (2.0.9)
-    unicode-display_width (1.6.0)
+    unicode-display_width (1.8.0)
 
 PLATFORMS
   ruby
@@ -112,7 +112,7 @@ DEPENDENCIES
   jekyll-commonmark (= 1.3.1)
   jekyll-paginate (= 1.1.0)
   jekyll-redirect-from (= 0.15.0)
-  jekyll-sitemap (= 1.3.1)
+  jekyll-sitemap (= 1.4.0)
   jekyll-time-to-read (= 0.1.2)
   nokogiri (= 1.10.4)
   rake (= 12.3.3)