diff --git a/Gemfile.lock b/Gemfile.lock
index 4da47e9..d13e30a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -44,8 +44,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     airbrussh (1.3.1)
       sshkit (>= 1.6.1, != 1.7.0)
     annotate (2.7.4)
@@ -235,7 +235,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     puma (3.12.1)
     rack (2.2.3)
     rack-mini-profiler (1.0.2)