diff --git a/Gemfile.lock b/Gemfile.lock
index 1b09a75..3d73e56 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,4 +1,3 @@
-
 GEM
   remote: https://rubygems.org/
   specs:
@@ -8,12 +7,13 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     colorator (0.1)
     colored (1.2)
     ethon (0.8.1)
       ffi (>= 1.3.0)
-    ffi (1.9.10)
+    ffi (1.15.5)
     html-proofer (2.6.4)
       activesupport (~> 4.2)
       addressable (~> 2.3)
@@ -51,9 +51,10 @@ GEM
     nokogiri (1.6.7.2)
       mini_portile2 (~> 2.0.0.rc2)
     parallel (1.6.1)
+    public_suffix (5.0.0)
     rb-fsevent (0.9.7)
-    rb-inotify (0.9.6)
-      ffi (>= 0.5.0)
+    rb-inotify (0.10.1)
+      ffi (~> 1.0)
     rouge (1.10.1)
     safe_yaml (1.0.4)
     sass (3.4.21)