diff --git a/Gemfile.lock b/Gemfile.lock
index cf0a9a3..7959e7d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,15 +7,15 @@ PATH
 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)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
     docile (1.1.5)
     hashdiff (0.3.7)
     json (2.3.1)
     minitest (5.11.3)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     rake (12.3.1)
     safe_yaml (1.0.4)
     simplecov (0.15.1)