diff --git a/Gemfile.lock b/Gemfile.lock
index 3f0fb0d..2e5e416 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -23,9 +23,9 @@ GEM
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.5.8)
-    nokogiri (1.13.6-x86_64-darwin)
+    nokogiri (1.13.9-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.13.6-x86_64-linux)
+    nokogiri (1.13.9-x86_64-linux)
       racc (~> 1.4)
     puma (5.6.4)
       nio4r (~> 2.0)