diff --git a/Gemfile.lock b/Gemfile.lock
index 6433f0e..0e1fe46 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,9 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (4.2.5)
+    activesupport (4.2.11.3)
       i18n (~> 0.7)
-      json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
@@ -31,8 +30,8 @@ GEM
     compass-import-once (1.0.5)
       sass (>= 3.2, < 3.5)
     erubis (2.7.0)
-    execjs (2.6.0)
-    ffi (1.9.10)
+    execjs (2.7.0)
+    ffi (1.13.1)
     haml (4.0.7)
       tilt
     haml_assets (0.2.2)
@@ -46,11 +45,11 @@ GEM
     hooks (0.4.1)
       uber (~> 0.0.14)
     i18n (0.7.0)
-    json (1.8.3)
+    json (2.3.1)
     kramdown (1.9.0)
-    listen (3.0.5)
-      rb-fsevent (>= 0.9.3)
-      rb-inotify (>= 0.9)
+    listen (3.0.8)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
     middleman (3.4.0)
       coffee-script (~> 2.2)
       compass (>= 1.0.0, < 2.0.0)
@@ -83,31 +82,31 @@ GEM
       sprockets (~> 2.12.1)
       sprockets-helpers (~> 1.1.0)
       sprockets-sass (~> 1.3.0)
-    mime-types (3.0)
+    mime-types (3.3.1)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2015.1120)
-    mini_portile2 (2.0.0)
-    minitest (5.8.3)
+    mime-types-data (3.2020.0512)
+    mini_portile2 (2.4.0)
+    minitest (5.14.1)
     multi_json (1.11.2)
     net-sftp (2.1.2)
       net-ssh (>= 2.6.5)
     net-ssh (3.0.1)
-    nokogiri (1.6.7)
-      mini_portile2 (~> 2.0.0.rc2)
-    padrino-helpers (0.12.5)
+    nokogiri (1.10.10)
+      mini_portile2 (~> 2.4.0)
+    padrino-helpers (0.12.9)
       i18n (~> 0.6, >= 0.6.7)
-      padrino-support (= 0.12.5)
-      tilt (~> 1.4.1)
-    padrino-support (0.12.5)
+      padrino-support (= 0.12.9)
+      tilt (>= 1.4.1, < 3)
+    padrino-support (0.12.9)
       activesupport (>= 3.1)
     ptools (1.3.3)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-rewrite (1.5.1)
-    rack-test (0.6.3)
-      rack (>= 1.0)
-    rb-fsevent (0.9.6)
-    rb-inotify (0.9.5)
-      ffi (>= 0.5.0)
+    rack-test (1.1.0)
+      rack (>= 1.0, < 3)
+    rb-fsevent (0.10.4)
+    rb-inotify (0.10.1)
+      ffi (~> 1.0)
     sass (3.4.19)
     sprockets (2.12.4)
       hike (~> 1.2)
@@ -119,16 +118,16 @@ GEM
     sprockets-sass (1.3.1)
       sprockets (~> 2.0)
       tilt (~> 1.1)
-    thor (0.19.1)
-    thread_safe (0.3.5)
+    thor (1.0.1)
+    thread_safe (0.3.6)
     tilt (1.4.1)
-    tzinfo (1.2.2)
+    tzinfo (1.2.7)
       thread_safe (~> 0.1)
     uber (0.0.15)
     uglifier (2.7.2)
       execjs (>= 0.3.0)
       json (>= 1.8.0)
-    xpath (2.0.0)
+    xpath (2.1.0)
       nokogiri (~> 1.3)
 
 PLATFORMS