diff --git a/Gemfile.lock b/Gemfile.lock
index 91ab776a..6415dadf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,41 +1,53 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    colorator (0.1)
-    ffi (1.9.10)
-    jekyll (3.1.6)
-      colorator (~> 0.1)
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
+    colorator (1.1.0)
+    ffi (1.13.1)
+    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-redirect-from (0.11.0)
       jekyll (>= 2.0)
-    jekyll-sass-converter (1.4.0)
+    jekyll-sass-converter (1.5.2)
       sass (~> 3.4)
-    jekyll-watch (1.4.0)
-      listen (~> 3.0, < 3.1)
+    jekyll-watch (1.5.1)
+      listen (~> 3.0)
     json (1.8.3)
-    kramdown (1.11.1)
+    kramdown (1.17.0)
     libv8 (3.16.14.15)
-    liquid (3.0.6)
-    listen (3.0.8)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
+    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 (2.3.0)
     nokogiri (1.8.2)
       mini_portile2 (~> 2.3.0)
-    rb-fsevent (0.9.7)
-    rb-inotify (0.9.7)
-      ffi (>= 0.5.0)
+    pathutil (0.16.2)
+      forwardable-extended (~> 2.6)
+    public_suffix (4.0.5)
+    rb-fsevent (0.10.4)
+    rb-inotify (0.10.1)
+      ffi (~> 1.0)
     ref (2.0.0)
-    rouge (1.11.1)
-    safe_yaml (1.0.4)
-    sass (3.4.22)
+    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)
     therubyracer (0.12.2)
       libv8 (~> 3.16.14.0)
       ref