diff --git a/Gemfile.lock b/Gemfile.lock
index 882c5fa..233ba34 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -18,8 +18,8 @@ GIT
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     bcrypt (3.1.11)
     bcrypt-ruby (3.1.5)
       bcrypt (>= 3.1.3)
@@ -100,7 +100,7 @@ GEM
     net-ssh-gateway (2.0.0)
       net-ssh (>= 4.0.0)
     open4 (1.3.4)
-    public_suffix (3.0.1)
+    public_suffix (4.0.6)
     rack (2.0.3)
     rack-protection (2.0.0)
       rack