diff --git a/Gemfile.lock b/Gemfile.lock
index a76ad9e..2b1327a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -48,8 +48,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.5.1)
-      public_suffix (~> 2.0, >= 2.0.2)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     airbrussh (1.3.1)
       sshkit (>= 1.6.1, != 1.7.0)
     arbre (1.1.1)
@@ -198,7 +198,7 @@ GEM
     pry-byebug (3.4.2)
       byebug (~> 9.0)
       pry (~> 0.10)
-    public_suffix (2.0.5)
+    public_suffix (5.0.0)
     puma (3.12.0)
     rack (1.6.13)
     rack-cache (1.7.0)