diff --git a/Gemfile.lock b/Gemfile.lock
index 337429e..ddee23a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,8 +6,8 @@ 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)
     concurrent-ruby (1.1.4)
     diff-lcs (1.3)
     faraday (0.15.4)
@@ -45,7 +45,7 @@ GEM
     multipart-post (2.0.0)
     mustermann (1.0.3)
     os (1.0.0)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     rack (2.0.6)
     rack-protection (2.0.5)
       rack