diff --git a/Gemfile.lock b/Gemfile.lock
index 528a83d1..092b8a8a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -64,6 +64,7 @@ GEM
     concurrent-ruby (1.0.2)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
+    crass (1.0.6)
     css_parser (1.4.2)
       addressable
     database_cleaner (1.5.3)
@@ -120,7 +121,8 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
-    loofah (2.0.3)
+    loofah (2.19.1)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     lumberjack (1.0.10)
     mail (2.6.4)
@@ -133,14 +135,12 @@ GEM
     minitest (5.9.0)
     multi_xml (0.5.5)
     nenv (0.3.0)
-    nokogiri (1.6.8)
+    nokogiri (1.6.8.1)
       mini_portile2 (~> 2.1.0)
-      pkg-config (~> 1.1.7)
     notiffany (0.1.0)
       nenv (~> 0.1)
       shellany (~> 0.0)
     pg (0.18.4)
-    pkg-config (1.1.7)
     premailer (1.8.6)
       css_parser (>= 1.3.6)
       htmlentities (>= 4.0.0)
@@ -176,8 +176,8 @@ 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 (1.4.4)
+      loofah (~> 2.19, >= 2.19.1)
     rails_12factor (0.0.3)
       rails_serve_static_assets
       rails_stdout_logging