diff --git a/Gemfile.lock b/Gemfile.lock
index 814bb31..941ff5a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -62,8 +62,8 @@ 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)
     arel (9.0.0)
@@ -186,7 +186,7 @@ GEM
     paggio (0.2.6)
     parser (2.3.3.1)
       ast (~> 2.2)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     puma (4.3.9)
       nio4r (~> 2.0)
     rack (2.2.2)