diff --git a/Gemfile b/Gemfile
index 315a86d..7c451a7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,5 +8,5 @@ gem 'middleman-autoprefixer', '~> 2.7'
 gem 'middleman-sprockets', '~> 4.1'
 gem 'rouge', '~> 3.20'
 gem 'redcarpet', '~> 3.5.0'
-gem 'nokogiri', '~> 1.10.8'
+gem 'nokogiri', '~> 1.13.4'
 gem 'sass'
diff --git a/Gemfile.lock b/Gemfile.lock
index f8e2216..43a5705 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -77,10 +77,11 @@ GEM
     middleman-syntax (3.2.0)
       middleman-core (>= 3.2)
       rouge (~> 3.2)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.8.0)
     minitest (5.14.1)
-    nokogiri (1.10.9)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.13.4)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
     padrino-helpers (0.13.3.4)
       i18n (~> 0.6, >= 0.6.7)
       padrino-support (= 0.13.3.4)
@@ -89,6 +90,7 @@ GEM
       activesupport (>= 3.1)
     parallel (1.19.2)
     public_suffix (4.0.5)
+    racc (1.6.0)
     rack (2.2.3)
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
@@ -124,7 +126,7 @@ DEPENDENCIES
   middleman-autoprefixer (~> 2.7)
   middleman-sprockets (~> 4.1)
   middleman-syntax (~> 3.2)
-  nokogiri (~> 1.10.8)
+  nokogiri (~> 1.13.4)
   redcarpet (~> 3.5.0)
   rouge (~> 3.20)
   sass