diff --git a/site/Gemfile.lock b/site/Gemfile.lock
index 92de4d1..d65e7b9 100644
--- a/site/Gemfile.lock
+++ b/site/Gemfile.lock
@@ -31,7 +31,7 @@ GEM
     mercenary (0.3.6)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (5.0.0)
+    public_suffix (4.0.1)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)
       ffi (~> 1.0)