diff --git a/Gemfile.lock b/Gemfile.lock
index 28e6529..a1334c7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,8 +8,8 @@ PATH
 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)
     coderay (1.1.2)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
@@ -31,7 +31,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     rack (2.2.3)
     rake (13.0.1)
     rspec (3.8.0)