diff --git a/Gemfile.lock b/Gemfile.lock
index 9e6c54b..08de2c2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -85,10 +85,10 @@ GEM
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
     nio4r (2.5.7)
-    nokogiri (1.13.6)
+    nokogiri (1.13.9)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
-    nokogiri (1.13.6-x86_64-darwin)
+    nokogiri (1.13.9-x86_64-darwin)
       racc (~> 1.4)
     racc (1.6.0)
     rack (2.2.3.1)