diff --git a/Gemfile.lock b/Gemfile.lock
index 2ea0447..e0e388e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     buftok (0.2.0)
     byebug (10.0.2)
     chronic (0.10.2)
@@ -25,7 +25,7 @@ GEM
     multipart-post (2.0.0)
     naught (1.1.0)
     pg (1.1.3)
-    public_suffix (3.0.3)
+    public_suffix (4.0.7)
     simple_oauth (0.3.1)
     thread_safe (0.3.6)
     twitter (6.2.0)