diff --git a/Gemfile b/Gemfile
index 48ee7792..d2d3cc38 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
 source 'https://rubygems.org'
-gem 'jekyll', '3.1.6'
+gem 'jekyll', '3.6.3'
 gem 'sass'
 gem 'stringex'
diff --git a/Gemfile.lock b/Gemfile.lock
index 548fcafe..72edbb54 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,33 +1,39 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    colorator (0.1)
-    ffi (1.11.1)
-    jekyll (3.1.6)
-      colorator (~> 0.1)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
+    colorator (1.1.0)
+    ffi (1.15.5)
+    forwardable-extended (2.6.0)
+    jekyll (3.6.3)
+      addressable (~> 2.4)
+      colorator (~> 1.0)
       jekyll-sass-converter (~> 1.0)
       jekyll-watch (~> 1.1)
-      kramdown (~> 1.3)
-      liquid (~> 3.0)
+      kramdown (~> 1.14)
+      liquid (~> 4.0)
       mercenary (~> 0.3.3)
-      rouge (~> 1.7)
+      pathutil (~> 0.9)
+      rouge (>= 1.7, < 3)
       safe_yaml (~> 1.0)
     jekyll-sass-converter (1.5.2)
       sass (~> 3.4)
     jekyll-watch (1.5.1)
       listen (~> 3.0)
     kramdown (1.17.0)
-    liquid (3.0.6)
-    listen (3.1.5)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
-      ruby_dep (~> 1.2)
+    liquid (4.0.3)
+    listen (3.7.1)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
-    rb-fsevent (0.10.3)
-    rb-inotify (0.10.0)
+    pathutil (0.16.2)
+      forwardable-extended (~> 2.6)
+    public_suffix (4.0.6)
+    rb-fsevent (0.11.1)
+    rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rouge (1.11.1)
-    ruby_dep (1.5.0)
+    rouge (2.2.1)
     safe_yaml (1.0.5)
     sass (3.4.19)
     stringex (2.5.2)
@@ -36,7 +42,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  jekyll (= 3.1.6)
+  jekyll (= 3.6.3)
   sass
   stringex