diff --git a/Gemfile.lock b/Gemfile.lock
index 4a98cdc..7ab4eff 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -80,6 +80,7 @@ GEM
       mimemagic (>= 0.3.0)
     coderay (1.1.1)
     concurrent-ruby (1.1.4)
+    crass (1.0.6)
     database_cleaner (1.5.3)
     debug_inspector (0.0.2)
     diff-lcs (1.2.5)
@@ -101,7 +102,8 @@ GEM
     json (1.8.3)
     launchy (2.4.3)
       addressable (~> 2.3)
-    loofah (2.0.3)
+    loofah (2.18.0)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)
       mini_mime (>= 0.1.1)
@@ -153,8 +155,8 @@ GEM
       activesupport (>= 4.2.0.beta, < 5.0)
       nokogiri (~> 1.6.0)
       rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
+    rails-html-sanitizer (1.4.3)
+      loofah (~> 2.3)
     rails-observers (0.1.5)
       activemodel (>= 4.0)
     railties (4.2.7.1)