diff --git a/Gemfile b/Gemfile
index 7604fd427f2..63b6c3e3cf9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,6 +8,6 @@ gem 'middleman-autoprefixer', '~> 3.0'
 gem 'middleman-sprockets', '~> 4.1'
 gem 'rouge', '~> 3.21'
 gem 'redcarpet', '~> 3.5.0'
-gem 'nokogiri', '~> 1.13.3'
+gem 'nokogiri', '~> 1.13.9'
 gem 'sass'
 gem 'webrick'
diff --git a/Gemfile.lock b/Gemfile.lock
index bd60f7f66e1..6b9d86f40b4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -82,7 +82,7 @@ GEM
       rouge (~> 3.2)
     mini_portile2 (2.8.0)
     minitest (5.14.4)
-    nokogiri (1.13.4)
+    nokogiri (1.13.9)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     padrino-helpers (0.15.1)
@@ -132,7 +132,7 @@ DEPENDENCIES
   middleman-autoprefixer (~> 3.0)
   middleman-sprockets (~> 4.1)
   middleman-syntax (~> 3.2)
-  nokogiri (~> 1.13.3)
+  nokogiri (~> 1.13.9)
   redcarpet (~> 3.5.0)
   rouge (~> 3.21)
   sass