diff --git a/Gemfile.lock b/Gemfile.lock
index 176213a..aa9d192 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -43,12 +43,14 @@ GEM
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
     arel (6.0.0)
-    builder (3.2.2)
+    builder (3.2.3)
     byebug (3.0.0)
       columnize (~> 0.3)
       debugger-linecache (~> 1.2)
     coderay (1.0.8)
     columnize (0.9.0)
+    concurrent-ruby (1.1.5)
+    crass (1.0.5)
     debugger (1.6.8)
       columnize (>= 0.3.1)
       debugger-linecache (~> 1.2.0)
@@ -70,13 +72,14 @@ GEM
     guard-rspec (2.1.0)
       guard (>= 1.1)
       rspec (~> 2.11)
-    hike (1.2.3)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jdbc-sqlite3 (3.8.7)
-    json (1.8.2)
-    json (1.8.2-java)
+    json (1.8.6)
+    json (1.8.6-java)
     listen (0.5.3)
-    loofah (2.0.1)
+    loofah (2.3.0)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     lumberjack (1.0.2)
     mail (2.6.3)
@@ -84,12 +87,11 @@ GEM
     method_source (0.8.1)
     middleware (0.1.0)
     mime-types (2.4.3)
-    mini_portile (0.6.2)
-    minitest (5.5.1)
-    multi_json (1.11.0)
-    nokogiri (1.6.6.2)
-      mini_portile (~> 0.6.0)
-    nokogiri (1.6.6.2-java)
+    mini_portile2 (2.4.0)
+    minitest (5.12.2)
+    nokogiri (1.10.4)
+      mini_portile2 (~> 2.4.0)
+    nokogiri (1.10.4-java)
     power_assert (0.2.2)
     pry (0.9.10)
       coderay (~> 1.0.5)
@@ -100,7 +102,7 @@ GEM
       method_source (~> 0.8)
       slop (~> 3.3.1)
       spoon (~> 0.0)
-    rack (1.6.0)
+    rack (1.6.11)
     rack-contrib (1.1.0)
       rack (>= 0.9.1)
     rack-protection (1.2.0)
@@ -120,12 +122,12 @@ GEM
       sprockets-rails
     rails-deprecated_sanitizer (1.0.3)
       activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (1.0.6)
-      activesupport (>= 4.2.0.beta, < 5.0)
-      nokogiri (~> 1.6.0)
+    rails-dom-testing (1.0.9)
+      activesupport (>= 4.2.0, < 5.0)
+      nokogiri (~> 1.6)
       rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.0.2)
-      loofah (~> 2.0)
+    rails-html-sanitizer (1.3.0)
+      loofah (~> 2.3)
     railties (4.2.1)
       actionpack (= 4.2.1)
       activesupport (= 4.2.1)
@@ -160,24 +162,22 @@ GEM
     slop (3.3.3)
     spoon (0.0.4)
       ffi
-    sprockets (2.12.3)
-      hike (~> 1.2)
-      multi_json (~> 1.0)
-      rack (~> 1.0)
-      tilt (~> 1.1, != 1.3.0)
-    sprockets-rails (2.2.4)
-      actionpack (>= 3.0)
-      activesupport (>= 3.0)
-      sprockets (>= 2.8, < 4.0)
+    sprockets (4.0.0)
+      concurrent-ruby (~> 1.0)
+      rack (> 1, < 3)
+    sprockets-rails (3.2.1)
+      actionpack (>= 4.0)
+      activesupport (>= 4.0)
+      sprockets (>= 3.0.0)
     sqlite3 (1.3.10)
     test-unit (3.0.9)
       power_assert
     thor (0.19.1)
-    thread_safe (0.3.5)
-    thread_safe (0.3.5-java)
+    thread_safe (0.3.6)
+    thread_safe (0.3.6-java)
     tilt (1.4.1)
     timecop (0.5.3)
-    tzinfo (1.2.2)
+    tzinfo (1.2.5)
       thread_safe (~> 0.1)
 
 PLATFORMS