diff --git a/Gemfile.lock b/Gemfile.lock
index e0d6a31e..f989a927 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -86,6 +86,7 @@ GEM
     concord (0.1.5)
       adamantium (~> 0.2.0)
       equalizer (~> 0.0.9)
+    crass (1.0.6)
     cucumber (1.3.20)
       builder (>= 2.1.2)
       diff-lcs (>= 1.1.3)
@@ -143,7 +144,8 @@ GEM
     json_pure (1.8.2)
     launchy (2.4.3)
       addressable (~> 2.3)
-    loofah (2.0.3)
+    loofah (2.18.0)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.6.3)
       mime-types (>= 1.16, < 3)
@@ -217,8 +219,8 @@ GEM
       activesupport (>= 4.2.0.beta, < 5.0)
       nokogiri (~> 1.6.0)
       rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.0.2)
-      loofah (~> 2.0)
+    rails-html-sanitizer (1.4.3)
+      loofah (~> 2.3)
     rails-observers (0.1.2)
       activemodel (~> 4.0)
     rails_best_practices (1.15.7)