diff --git a/Gemfile.lock b/Gemfile.lock
index 4d67af5..dd39d9f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -58,6 +58,7 @@ GEM
       tins (~> 1.6.0)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
+    crass (1.0.6)
     database_cleaner (1.5.3)
     diff-lcs (1.2.5)
     docile (1.1.5)
@@ -70,7 +71,8 @@ GEM
     hashdiff (0.3.0)
     i18n (0.7.0)
     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)
@@ -80,10 +82,8 @@ GEM
     mime-types-data (3.2016.0521)
     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)
     power_assert (0.3.0)
     pry (0.10.3)
       coderay (~> 1.1.0)