diff --git a/Gemfile.lock b/Gemfile.lock
index 924eb96b..2fafa559 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -31,8 +31,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     amp-jekyll (1.0.3)
       fastimage (>= 1.8.0)
       jekyll (>= 3.0, < 5.0)
@@ -116,7 +116,7 @@ GEM
       racc (~> 1.4)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.6)
+    public_suffix (5.0.0)
     racc (1.5.2)
     rack (2.2.3)
     rb-fsevent (0.10.4)