diff --git a/backend/Gemfile.lock b/backend/Gemfile.lock
index 8780db3d..4c34eb06 100644
--- a/backend/Gemfile.lock
+++ b/backend/Gemfile.lock
@@ -104,7 +104,7 @@ GEM
     minitest (5.15.0)
     msgpack (1.4.5)
     nio4r (2.5.8)
-    nokogiri (1.13.6)
+    nokogiri (1.13.9)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     pg (1.3.5)