diff --git a/Gemfile.lock b/Gemfile.lock
index 9bdc705..c51111d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,8 +2,8 @@ GEM
   remote: https://rubygems.org/
   specs:
     ZenTest (4.11.0)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     builder (3.2.3)
     byebug (5.0.0)
       columnize (= 0.9.0)
@@ -53,7 +53,7 @@ GEM
     mustermann (1.0.3)
     nokogiri (1.8.4)
       mini_portile2 (~> 2.3.0)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     rack (2.0.5)
     rack-protection (2.0.3)
       rack