diff --git a/Gemfile b/Gemfile
index 08372f9726..b09a31e593 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 # A sample Gemfile
 source "https://rubygems.org"
 
-gem 'jekyll', '>= 4.0.0'
+gem 'jekyll', '>= 3.9.0'
 gem 'jekyll-assets', '>= 3.0.12'
diff --git a/Gemfile.lock b/Gemfile.lock
index 45bb938e57..a5d10bbd25 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,36 +6,39 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.7)
+      public_suffix (>= 2.0.2, < 7.0)
     colorator (1.1.0)
-    concurrent-ruby (1.1.6)
-    em-websocket (0.5.1)
+    concurrent-ruby (1.3.5)
+    csv (3.3.5)
+    em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
-      http_parser.rb (~> 0.6.0)
+      http_parser.rb (~> 0)
     eventmachine (1.2.7)
     execjs (2.7.0)
     extras (0.3.0)
       forwardable-extended (~> 2.5)
     fastimage (2.1.7)
-    ffi (1.13.1)
+    ffi (1.17.2)
     forwardable-extended (2.6.0)
-    http_parser.rb (0.6.0)
-    i18n (0.9.5)
+    http_parser.rb (0.8.0)
+    i18n (1.14.7)
       concurrent-ruby (~> 1.0)
-    jekyll (3.8.7)
+    jekyll (3.10.0)
       addressable (~> 2.4)
       colorator (~> 1.0)
+      csv (~> 3.0)
       em-websocket (~> 0.5)
-      i18n (~> 0.7)
+      i18n (>= 0.7, < 2)
       jekyll-sass-converter (~> 1.0)
       jekyll-watch (~> 2.0)
-      kramdown (~> 1.14)
+      kramdown (>= 1.17, < 3)
       liquid (~> 4.0)
       mercenary (~> 0.3.3)
       pathutil (~> 0.9)
       rouge (>= 1.7, < 4)
       safe_yaml (~> 1.0)
+      webrick (>= 1.0)
     jekyll-assets (3.0.12)
       activesupport (~> 5.0)
       execjs (~> 2.7)
@@ -54,12 +57,13 @@ GEM
       sass (~> 3.4)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    kramdown (1.17.0)
-    liquid (4.0.3)
+    kramdown (2.5.1)
+      rexml (>= 3.3.9)
+    liquid (4.0.4)
     liquid-tag-parser (1.9.0)
       extras (~> 0.3)
       liquid (>= 3.0, < 5.0)
-    listen (3.2.1)
+    listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
@@ -69,12 +73,13 @@ GEM
       mini_portile2 (~> 2.4.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.5)
+    public_suffix (5.1.1)
     rack (2.2.3)
-    rb-fsevent (0.10.4)
-    rb-inotify (0.10.1)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rouge (3.20.0)
+    rexml (3.4.1)
+    rouge (3.30.0)
     safe_yaml (1.0.5)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
@@ -87,12 +92,13 @@ GEM
     thread_safe (0.3.6)
     tzinfo (1.2.7)
       thread_safe (~> 0.1)
+    webrick (1.9.1)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  jekyll (>= 3.6.3)
+  jekyll (>= 3.9.0)
   jekyll-assets (>= 3.0.12)
 
 BUNDLED WITH