diff --git a/Gemfile.lock b/Gemfile.lock
index 0ff3d58..4a59f3c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -91,7 +91,7 @@ GEM
     minitest (5.11.1)
     multi_json (1.12.2)
     nio4r (2.2.0)
-    nokogiri (1.13.4)
+    nokogiri (1.13.9)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     public_suffix (3.0.1)