diff --git a/Gemfile.lock b/Gemfile.lock
index f1e20e9..f6e596a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -79,7 +79,7 @@ GEM
     minitest (5.11.3)
     multi_json (1.13.1)
     nio4r (2.5.8)
-    nokogiri (1.13.3)
+    nokogiri (1.13.9)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     pg (0.21.0)