diff --git a/Gemfile.lock b/Gemfile.lock
index 1dff16f..67a0aff 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -14,7 +14,7 @@ GEM
     multi_json (1.14.1)
     nanoc (3.7.5)
       cri (~> 2.3)
-    nokogiri (1.13.6)
+    nokogiri (1.13.9)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     pygments.rb (1.2.1)