diff --git a/Gemfile.lock b/Gemfile.lock
index 7e201be..c42a620 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -51,7 +51,7 @@ GEM
     bootstrap-sass (3.3.6)
       autoprefixer-rails (>= 5.2.1)
       sass (>= 3.3.4)
-    builder (3.2.2)
+    builder (3.2.3)
     byebug (8.2.2)
     coderay (1.1.1)
     coffee-rails (4.1.1)
@@ -62,6 +62,7 @@ GEM
       execjs
     coffee-script-source (1.10.0)
     concurrent-ruby (1.0.1)
+    crass (1.0.5)
     debug_inspector (0.0.2)
     erubis (2.7.0)
     execjs (2.6.0)
@@ -74,7 +75,8 @@ GEM
       activesupport (>= 4.1.0)
     high_voltage (2.4.0)
     hub (1.12.4)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jbuilder (2.4.1)
       activesupport (>= 3.0.0, < 5.1)
       multi_json (~> 1.2)
@@ -82,17 +84,18 @@ GEM
       rails-dom-testing (~> 1.0)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (1.8.3)
-    loofah (2.0.3)
+    json (1.8.6)
+    loofah (2.3.1)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.6.3)
       mime-types (>= 1.16, < 3)
     mime-types (2.99.1)
-    mini_portile2 (2.0.0)
-    minitest (5.8.4)
+    mini_portile2 (2.4.0)
+    minitest (5.13.0)
     multi_json (1.11.2)
-    nokogiri (1.6.7.2)
-      mini_portile2 (~> 2.0.0.rc2)
+    nokogiri (1.9.1)
+      mini_portile2 (~> 2.4.0)
     parser (2.3.0.6)
       ast (~> 2.2)
     pg (0.18.4)
@@ -100,7 +103,7 @@ GEM
     puma (3.0.2)
     quiet_assets (1.1.0)
       railties (>= 3.1, < 5.0)
-    rack (1.6.4)
+    rack (1.6.11)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.5.2)
@@ -116,12 +119,12 @@ GEM
       sprockets-rails
     rails-deprecated_sanitizer (1.0.3)
       activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (1.0.7)
-      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 (1.0.3)
-      loofah (~> 2.0)
+    rails-html-sanitizer (1.3.0)
+      loofah (~> 2.3)
     rails_12factor (0.0.3)
       rails_serve_static_assets
       rails_stdout_logging
@@ -168,9 +171,9 @@ GEM
       sprockets (>= 3.0.0)
     temple (0.7.6)
     thor (0.19.1)
-    thread_safe (0.3.5)
+    thread_safe (0.3.6)
     tilt (2.0.2)
-    tzinfo (1.2.2)
+    tzinfo (1.2.5)
       thread_safe (~> 0.1)
     uglifier (2.7.2)
       execjs (>= 0.3.0)