diff --git a/web_site/Gemfile.lock b/web_site/Gemfile.lock
index e4160ae..b1ae1cc 100644
--- a/web_site/Gemfile.lock
+++ b/web_site/Gemfile.lock
@@ -257,7 +257,7 @@ GEM
     msgpack (1.5.0)
     multi_json (1.15.0)
     nio4r (2.5.8)
-    nokogiri (1.13.3)
+    nokogiri (1.13.9)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     non-stupid-digest-assets (1.0.9)