diff --git a/website/Gemfile.lock b/website/Gemfile.lock
index 6011223cd..ee809de28 100644
--- a/website/Gemfile.lock
+++ b/website/Gemfile.lock
@@ -7,8 +7,8 @@ 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)
     colorator (1.1.0)
     colorize (0.8.1)
     concurrent-ruby (1.0.5)
@@ -65,7 +65,7 @@ GEM
     parallel (1.12.1)
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.2)
+    public_suffix (5.0.0)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)