diff --git a/Gemfile.lock b/Gemfile.lock
index 4594f9f..000264d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -42,7 +42,7 @@ GEM
     color (1.8)
     colorator (1.1.0)
     concurrent-ruby (1.1.5)
-    crass (1.0.4)
+    crass (1.0.6)
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
@@ -91,7 +91,7 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
-    loofah (2.2.3)
+    loofah (2.18.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)
@@ -102,7 +102,7 @@ GEM
     mini_portile2 (2.8.0)
     minitest (5.11.3)
     multipart-post (2.0.0)
-    nokogiri (1.13.4)
+    nokogiri (1.13.6)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     octokit (4.13.0)
@@ -136,8 +136,8 @@ GEM
       activesupport (>= 4.2.0, < 5.0)
       nokogiri (~> 1.6)
       rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.0.4)
-      loofah (~> 2.2, >= 2.2.2)
+    rails-html-sanitizer (1.4.3)
+      loofah (~> 2.3)
     railties (4.2.10)
       actionpack (= 4.2.10)
       activesupport (= 4.2.10)