diff --git a/Gemfile.lock b/Gemfile.lock
index b8846d7..b9e8fef 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     buftok (0.2.0)
     domain_name (0.5.20180417)
       unf (>= 0.0.5, < 1.0.0)
@@ -24,7 +24,7 @@ GEM
     naught (1.1.0)
     nokogiri (1.10.3)
       mini_portile2 (~> 2.4.0)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     simple_oauth (0.3.1)
     thread_safe (0.3.6)
     twitter (6.2.0)