diff --git a/Gemfile.lock b/Gemfile.lock
index 0b201ea..4fb1647 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -55,6 +55,7 @@ GEM
       execjs
     coffee-script-source (1.10.0)
     concurrent-ruby (1.0.2)
+    crass (1.0.5)
     debug_inspector (0.0.2)
     declarative (0.0.8)
       uber (>= 0.0.15)
@@ -88,7 +89,8 @@ GEM
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
     json (1.8.3)
-    loofah (2.0.3)
+    loofah (2.3.1)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.6.4)
       mime-types (>= 1.16, < 4)
@@ -101,10 +103,8 @@ GEM
     multi_xml (0.5.5)
     mustermann19 (0.4.4)
       enumerable-lazy
-    nokogiri (1.6.8)
+    nokogiri (1.6.8.1)
       mini_portile2 (~> 2.1.0)
-      pkg-config (~> 1.1.7)
-    pkg-config (1.1.7)
     rack (1.6.4)
     rack-accept (0.4.5)
       rack (>= 0.4)