diff --git a/Gemfile b/Gemfile
index 6bb8db6..84dd52c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 source 'https://rubygems.org'
 
 gem 'rake'
-gem 'jekyll'
+gem 'jekyll', '>= 3.0.0'
 gem 'mini_magick'
diff --git a/Gemfile.lock b/Gemfile.lock
index 96080fc..ee0c349 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,68 +1,73 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    blankslate (2.1.2.4)
-    celluloid (0.15.2)
-      timers (~> 1.1.0)
-    classifier (1.3.4)
-      fast-stemmer (>= 1.0.0)
-    coffee-script (2.2.0)
-      coffee-script-source
-      execjs
-    coffee-script-source (1.7.0)
-    colorator (0.1)
-    execjs (2.0.2)
-    fast-stemmer (1.0.2)
-    ffi (1.9.3)
-    jekyll (2.0.3)
-      classifier (~> 1.3)
-      colorator (~> 0.1)
-      jekyll-coffeescript (~> 1.0)
-      jekyll-sass-converter (~> 1.0)
-      kramdown (~> 1.3)
-      liquid (~> 2.5.5)
-      listen (~> 2.5)
-      mercenary (~> 0.3.3)
-      pygments.rb (~> 0.5.0)
-      redcarpet (~> 3.1)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
+    colorator (1.1.0)
+    concurrent-ruby (1.1.10)
+    em-websocket (0.5.3)
+      eventmachine (>= 0.12.9)
+      http_parser.rb (~> 0)
+    eventmachine (1.2.7)
+    ffi (1.15.5)
+    forwardable-extended (2.6.0)
+    http_parser.rb (0.8.0)
+    i18n (1.10.0)
+      concurrent-ruby (~> 1.0)
+    jekyll (4.2.2)
+      addressable (~> 2.4)
+      colorator (~> 1.0)
+      em-websocket (~> 0.5)
+      i18n (~> 1.0)
+      jekyll-sass-converter (~> 2.0)
+      jekyll-watch (~> 2.0)
+      kramdown (~> 2.3)
+      kramdown-parser-gfm (~> 1.0)
+      liquid (~> 4.0)
+      mercenary (~> 0.4.0)
+      pathutil (~> 0.9)
+      rouge (~> 3.0)
       safe_yaml (~> 1.0)
-      toml (~> 0.1.0)
-    jekyll-coffeescript (1.0.0)
-      coffee-script (~> 2.2)
-    jekyll-sass-converter (1.0.0)
-      sass (~> 3.2)
-    kramdown (1.4.0)
-    liquid (2.5.5)
-    listen (2.7.5)
-      celluloid (>= 0.15.2)
-      rb-fsevent (>= 0.9.3)
-      rb-inotify (>= 0.9)
-    mercenary (0.3.3)
+      terminal-table (~> 2.0)
+    jekyll-sass-converter (2.2.0)
+      sassc (> 2.0.1, < 3.0)
+    jekyll-watch (2.2.1)
+      listen (~> 3.0)
+    kramdown (2.3.2)
+      rexml
+    kramdown-parser-gfm (1.1.0)
+      kramdown (~> 2.0)
+    liquid (4.0.3)
+    listen (3.7.1)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
+    mercenary (0.4.0)
     mini_magick (3.7.0)
       subexec (~> 0.2.1)
-    parslet (1.5.0)
-      blankslate (~> 2.0)
-    posix-spawn (0.3.8)
-    pygments.rb (0.5.4)
-      posix-spawn (~> 0.3.6)
-      yajl-ruby (~> 1.1.0)
+    pathutil (0.16.2)
+      forwardable-extended (~> 2.6)
+    public_suffix (4.0.6)
     rake (10.3.2)
-    rb-fsevent (0.9.4)
-    rb-inotify (0.9.4)
-      ffi (>= 0.5.0)
-    redcarpet (3.1.2)
-    safe_yaml (1.0.3)
-    sass (3.3.7)
+    rb-fsevent (0.11.1)
+    rb-inotify (0.10.1)
+      ffi (~> 1.0)
+    rexml (3.2.5)
+    rouge (3.28.0)
+    safe_yaml (1.0.5)
+    sassc (2.4.0)
+      ffi (~> 1.9)
     subexec (0.2.3)
-    timers (1.1.0)
-    toml (0.1.1)
-      parslet (~> 1.5.0)
-    yajl-ruby (1.1.0)
+    terminal-table (2.0.0)
+      unicode-display_width (~> 1.1, >= 1.1.1)
+    unicode-display_width (1.8.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  jekyll
+  jekyll (>= 3.0.0)
   mini_magick
   rake
+
+BUNDLED WITH
+   2.1.4