diff --git a/Gemfile.lock b/Gemfile.lock
index d7bd451..0c54924 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -63,7 +63,7 @@ GEM
     coffee-script-source (1.10.0)
     commonjs (0.2.7)
     concurrent-ruby (1.0.5)
-    crass (1.0.3)
+    crass (1.0.6)
     daemons (1.2.4)
     debug_inspector (0.0.2)
     dotenv (2.1.1)
@@ -97,7 +97,7 @@ GEM
       sprockets (> 2, < 4)
       tilt
     libv8 (3.16.14.15)
-    loofah (2.1.1)
+    loofah (2.18.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.0)
@@ -146,8 +146,8 @@ GEM
       activesupport (>= 4.2.0.beta, < 5.0)
       nokogiri (~> 1.6)
       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)
     rails_12factor (0.0.3)