diff --git a/Gemfile b/Gemfile
index 738259c48..230702a15 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source "https://rubygems.org"
 
-gem "jekyll"
+gem "jekyll", "~> 4.0"
 
 group :jekyll_plugins do
 	gem 'jekyll-toc'
@@ -11,3 +11,5 @@ group :jekyll_plugins do
 end
 
 gem 'wdm', '>= 0.1.1' if Gem.win_platform?
+
+
diff --git a/Gemfile.lock b/Gemfile.lock
index e65933ccb..85faad428 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,17 +4,17 @@ GEM
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
     colorator (1.1.0)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.1.6)
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
     eventmachine (1.2.7)
-    ffi (1.11.3)
+    ffi (1.12.2)
     forwardable-extended (2.6.0)
     htmlbeautifier (1.3.1)
     htmlcompressor (0.4.0)
     http_parser.rb (0.6.0)
-    i18n (1.7.0)
+    i18n (1.8.2)
       concurrent-ruby (~> 1.0)
     jekyll (4.0.0)
       addressable (~> 2.4)
@@ -33,9 +33,9 @@ GEM
       terminal-table (~> 1.8)
     jekyll-random (0.1)
       jekyll (>= 3.3, < 5.0)
-    jekyll-redirect-from (0.15.0)
+    jekyll-redirect-from (0.16.0)
       jekyll (>= 3.3, < 5.0)
-    jekyll-sass-converter (2.0.1)
+    jekyll-sass-converter (2.1.0)
       sassc (> 2.0.1, < 3.0)
     jekyll-tidy (0.2.2)
       htmlbeautifier
@@ -52,33 +52,33 @@ GEM
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
     liquid (4.0.3)
-    listen (3.2.0)
+    listen (3.2.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
     mini_i18n (0.8.0)
     mini_portile2 (2.4.0)
-    nokogiri (1.10.7)
+    nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.1)
+    public_suffix (4.0.3)
     rb-fsevent (0.10.3)
-    rb-inotify (0.10.0)
+    rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rouge (3.13.0)
+    rouge (3.17.0)
     safe_yaml (1.0.5)
     sassc (2.2.1)
       ffi (~> 1.9)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
-    unicode-display_width (1.6.0)
+    unicode-display_width (1.7.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  jekyll
+  jekyll (~> 4.0)
   jekyll-random
   jekyll-redirect-from
   jekyll-tidy