diff --git a/Gemfile.lock b/Gemfile.lock
index 99b68b8..2cec3f0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -53,6 +53,7 @@ GEM
       json (>= 1.7)
       mime-types (>= 1.16)
     concurrent-ruby (1.0.2)
+    crass (1.0.6)
     debug_inspector (0.0.2)
     domain_name (0.5.20160615)
       unf (>= 0.0.5, < 1.0.0)
@@ -78,7 +79,8 @@ GEM
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
     json (1.8.3)
-    loofah (2.0.3)
+    loofah (2.19.1)
+      crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.6.4)
       mime-types (>= 1.16, < 4)
@@ -99,11 +101,9 @@ GEM
     multi_json (1.12.1)
     netrc (0.11.0)
     newrelic_rpm (3.16.0.318)
-    nokogiri (1.6.8)
+    nokogiri (1.6.8.1)
       mini_portile2 (~> 2.1.0)
-      pkg-config (~> 1.1.7)
     pg (0.18.4)
-    pkg-config (1.1.7)
     puma (3.5.2)
     quiet_assets (1.0.3)
       railties (>= 3.1, < 5.0)