diff --git a/Gemfile.lock b/Gemfile.lock
index 9c830a7b0..adc37f7de 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -44,8 +44,8 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.1)
-      public_suffix (~> 2.0, >= 2.0.2)
+    addressable (2.5.2)
+      public_suffix (>= 2.0.2, < 4.0)
     airbrussh (1.3.0)
       sshkit (>= 1.6.1, != 1.7.0)
     annotate (2.7.2)
@@ -298,7 +298,7 @@ GEM
       slop (~> 3.4)
     pry-rails (0.3.6)
       pry (>= 0.10.4)
-    public_suffix (2.0.5)
+    public_suffix (3.0.0)
     puma (3.9.1)
     pundit (1.1.0)
       activesupport (>= 3.0.0)
@@ -590,4 +590,4 @@ RUBY VERSION
    ruby 2.4.1p111
 
 BUNDLED WITH
-   1.15.3
+   1.15.4