diff --git a/Gemfile.lock b/Gemfile.lock
index 18ee784..b28cff6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,8 +6,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     coderay (1.1.2)
     colorator (1.1.0)
     colorize (0.8.1)
@@ -106,7 +106,7 @@ GEM
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.1)
+    public_suffix (4.0.6)
     pygments.rb (1.2.1)
       multi_json (>= 1.0.0)
     rb-fsevent (0.10.2)