diff --git a/app/Gemfile.lock b/app/Gemfile.lock
index 01da8b2..3996d48 100644
--- a/app/Gemfile.lock
+++ b/app/Gemfile.lock
@@ -65,6 +65,7 @@ GEM
       execjs
     coffee-script-source (1.12.2)
     concurrent-ruby (1.0.5)
+    crass (1.0.5)
     erubi (1.6.1)
     excon (0.57.1)
     execjs (2.7.0)
@@ -240,7 +241,8 @@ GEM
     listen (3.0.8)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    loofah (2.0.3)
+    loofah (2.3.1)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     lumberjack (1.0.12)
     mail (2.6.6)
@@ -250,7 +252,7 @@ GEM
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
     mini_magick (4.7.0)
-    mini_portile2 (2.2.0)
+    mini_portile2 (2.4.0)
     minitest (5.10.3)
     minitest-reporters (1.1.14)
       ansi
@@ -260,8 +262,8 @@ GEM
     multi_json (1.12.1)
     nenv (0.3.0)
     nio4r (2.1.0)
-    nokogiri (1.8.0)
-      mini_portile2 (~> 2.2.0)
+    nokogiri (1.10.5)
+      mini_portile2 (~> 2.4.0)
     notiffany (0.1.1)
       nenv (~> 0.1)
       shellany (~> 0.0)
@@ -391,7 +393,6 @@ DEPENDENCIES
   spring-watcher-listen (= 2.0.1)
   therubyracer
   turbolinks (= 5.0.1)
-  tzinfo-data
   uglifier (= 3.2.0)
   web-console (= 3.5.1)
   will_paginate (= 3.1.5)