diff --git a/Gemfile.lock b/Gemfile.lock
index 1b09a75..fccec72 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,4 +1,3 @@
-
 GEM
   remote: https://rubygems.org/
   specs:
@@ -9,11 +8,12 @@ GEM
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
     addressable (2.4.0)
-    colorator (0.1)
+    colorator (1.1.0)
     colored (1.2)
     ethon (0.8.1)
       ffi (>= 1.3.0)
-    ffi (1.9.10)
+    ffi (1.12.1)
+    forwardable-extended (2.6.0)
     html-proofer (2.6.4)
       activesupport (~> 4.2)
       addressable (~> 2.3)
@@ -24,39 +24,47 @@ GEM
       typhoeus (~> 0.7)
       yell (~> 2.0)
     i18n (0.7.0)
-    jekyll (3.1.1)
-      colorator (~> 0.1)
+    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-paginate (1.1.0)
-    jekyll-sass-converter (1.4.0)
+    jekyll-sass-converter (1.5.2)
       sass (~> 3.4)
     jekyll-sitemap (0.10.0)
-    jekyll-watch (1.3.1)
+    jekyll-watch (1.5.1)
       listen (~> 3.0)
     json (1.8.3)
-    kramdown (1.9.0)
-    liquid (3.0.6)
-    listen (3.0.5)
-      rb-fsevent (>= 0.9.3)
-      rb-inotify (>= 0.9)
-    mercenary (0.3.5)
+    kramdown (1.17.0)
+    liquid (4.0.3)
+    listen (3.2.1)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
+    mercenary (0.3.6)
     mini_portile2 (2.0.0)
     minitest (5.8.4)
     nokogiri (1.6.7.2)
       mini_portile2 (~> 2.0.0.rc2)
     parallel (1.6.1)
-    rb-fsevent (0.9.7)
-    rb-inotify (0.9.6)
-      ffi (>= 0.5.0)
-    rouge (1.10.1)
-    safe_yaml (1.0.4)
-    sass (3.4.21)
+    pathutil (0.16.2)
+      forwardable-extended (~> 2.6)
+    rb-fsevent (0.10.3)
+    rb-inotify (0.10.1)
+      ffi (~> 1.0)
+    rouge (2.2.1)
+    safe_yaml (1.0.5)
+    sass (3.7.4)
+      sass-listen (~> 4.0.0)
+    sass-listen (4.0.0)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
     thread_safe (0.3.5)
     typhoeus (0.8.0)
       ethon (>= 0.8.0)