diff --git a/Gemfile.lock b/Gemfile.lock
index 254f817..8db5b92 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -55,8 +55,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     arel (6.0.4)
     better_errors (2.4.0)
       coderay (>= 1.0.0)
@@ -253,7 +253,7 @@ GEM
       coderay (~> 1.0)
       method_source (~> 0.8)
       slop (~> 3.4)
-    public_suffix (3.0.2)
+    public_suffix (5.0.0)
     puma (3.11.4)
     rack (1.6.12)
     rack-contrib (1.8.0)