diff --git a/Gemfile.lock b/Gemfile.lock
index df2a29f..31461ad 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -53,6 +53,7 @@ GEM
       execjs
     coffee-script-source (1.10.0)
     concurrent-ruby (1.0.2)
+    crass (1.0.5)
     debug_inspector (0.0.2)
     domain_name (0.5.20161021)
       unf (>= 0.0.5, < 1.0.0)
@@ -90,7 +91,8 @@ GEM
     listen (3.0.8)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    loofah (2.0.3)
+    loofah (2.4.0)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.6.4)
       mime-types (>= 1.16, < 4)
@@ -129,8 +131,8 @@ GEM
     rails-dom-testing (2.0.1)
       activesupport (>= 4.2.0, < 6.0)
       nokogiri (~> 1.6.0)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
+    rails-html-sanitizer (1.3.0)
+      loofah (~> 2.3)
     railties (5.0.0.1)
       actionpack (= 5.0.0.1)
       activesupport (= 5.0.0.1)