diff --git a/Gemfile.lock b/Gemfile.lock
index 2a79ae7..abc6207 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -61,6 +61,7 @@ GEM
       execjs
     coffee-script-source (1.12.2)
     concurrent-ruby (1.0.5)
+    crass (1.0.6)
     debug_inspector (0.0.2)
     erubis (2.7.0)
     execjs (2.7.0)
@@ -79,7 +80,8 @@ GEM
     listen (3.0.8)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    loofah (2.0.3)
+    loofah (2.18.0)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.6.5)
       mime-types (>= 1.16, < 4)
@@ -87,12 +89,13 @@ GEM
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mini_portile2 (2.1.0)
+    mini_portile2 (2.8.0)
     minitest (5.10.2)
     multi_json (1.12.1)
     nio4r (2.1.0)
-    nokogiri (1.7.2)
-      mini_portile2 (~> 2.1.0)
+    nokogiri (1.13.6)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
     pg (0.20.0)
     pry (0.10.4)
       coderay (~> 1.1.0)
@@ -106,6 +109,7 @@ GEM
       multi_json (~> 1.0)
       pusher-signature (~> 0.1.8)
     pusher-signature (0.1.8)
+    racc (1.6.0)
     rack (2.0.3)
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -124,8 +128,8 @@ GEM
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
+    rails-html-sanitizer (1.4.3)
+      loofah (~> 2.3)
     railties (5.0.3)
       actionpack (= 5.0.3)
       activesupport (= 5.0.3)