diff --git a/Gemfile.lock b/Gemfile.lock
index 5df8f4b..204df56 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -27,18 +27,18 @@ GEM
     builder (3.2.2)
     byebug (9.0.5)
     concurrent-ruby (1.0.2)
+    crass (1.0.4)
     diff-lcs (1.2.5)
     erubis (2.7.0)
     i18n (0.7.0)
-    loofah (2.0.3)
+    loofah (2.2.3)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     method_source (0.8.2)
     mini_portile2 (2.1.0)
     minitest (5.9.0)
-    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 (2.0.1)
     rack-test (0.6.3)
       rack (>= 1.0)