diff --git a/Gemfile.lock b/Gemfile.lock
index c03650ce..3b77bbff 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -92,6 +92,7 @@ GEM
       rack-test (>= 0.5.4)
       xpath (~> 2.0)
     coderay (1.1.0)
+    crass (1.0.6)
     cucumber (1.3.20)
       builder (>= 2.1.2)
       diff-lcs (>= 1.1.3)
@@ -160,7 +161,8 @@ GEM
       activesupport (>= 3.0.0)
     kgio (2.10.0)
     libv8 (3.16.14.13)
-    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)
@@ -206,8 +208,8 @@ 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_12factor (0.0.3)