diff --git a/Gemfile b/Gemfile
index 3897dff..bbc1738 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,6 +8,6 @@ gem 'middleman-autoprefixer', '~> 2.7'
 gem 'middleman-sprockets', '~> 4.1'
 gem 'rouge', '~> 3.21'
 gem 'redcarpet', '~> 3.5.0'
-gem 'nokogiri', '~> 1.11.0'
+gem 'nokogiri', '~> 1.13.9'
 gem 'sass'
 gem 'webrick'
diff --git a/Gemfile.lock b/Gemfile.lock
index e2f55c6..8ab3d61 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -86,10 +86,10 @@ GEM
     middleman-syntax (3.2.0)
       middleman-core (>= 3.2)
       rouge (~> 3.2)
-    mini_portile2 (2.5.0)
+    mini_portile2 (2.8.0)
     minitest (5.14.4)
-    nokogiri (1.11.3)
-      mini_portile2 (~> 2.5.0)
+    nokogiri (1.13.9)
+      mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     padrino-helpers (0.13.3.4)
       i18n (~> 0.6, >= 0.6.7)
@@ -100,7 +100,7 @@ GEM
     parallel (1.20.1)
     parslet (1.8.2)
     public_suffix (4.0.6)
-    racc (1.5.2)
+    racc (1.6.0)
     rack (2.2.3)
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
@@ -140,7 +140,7 @@ DEPENDENCIES
   middleman-autoprefixer (~> 2.7)
   middleman-sprockets (~> 4.1)
   middleman-syntax (~> 3.2)
-  nokogiri (~> 1.11.0)
+  nokogiri (~> 1.13.9)
   redcarpet (~> 3.5.0)
   rouge (~> 3.21)
   sass