diff --git a/lib/turbolinks/Gemfile.lock b/lib/turbolinks/Gemfile.lock
index 26e3b0594e9..8c5646c2f4f 100644
--- a/lib/turbolinks/Gemfile.lock
+++ b/lib/turbolinks/Gemfile.lock
@@ -6,8 +6,8 @@ GEM
       i18n (~> 0.7)
       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)
     blade (0.7.1)
       activesupport (>= 3.0.0)
       blade-qunit_adapter (~> 2.0.1)
@@ -61,7 +61,7 @@ GEM
     json (1.8.3)
     minitest (5.11.1)
     multi_json (1.12.2)
-    public_suffix (3.0.1)
+    public_suffix (5.0.1)
     rack (1.6.4)
     rake (10.4.2)
     sprockets (3.6.0)