diff --git a/Gemfile.lock b/Gemfile.lock
index 9d736ce1..d60112b8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -42,8 +42,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       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)
     airbrussh (1.3.0)
       sshkit (>= 1.6.1, != 1.7.0)
     archive-zip (0.11.0)
@@ -134,7 +134,7 @@ GEM
     nokogiri (1.8.5)
       mini_portile2 (~> 2.3.0)
     pg (1.1.3)
-    public_suffix (3.0.3)
+    public_suffix (4.0.7)
     puma (3.12.0)
     rack (2.0.5)
     rack-proxy (0.6.5)