diff --git a/Gemfile b/Gemfile
index ae14d2d..9bff6f4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,7 +10,7 @@ gem "middleman-sprockets", "~> 4.1.0"
 gem "middleman-livereload", "~> 3.4.3"
 gem 'rouge', '~> 2.0.5'
 gem 'redcarpet', '~> 3.4.0'
-gem 'nokogiri', '~> 1.8.1'
+gem 'nokogiri', '~> 1.13.5'
 
 # Performance-booster for watching directories on Windows
 gem "wdm", "~> 0.1.0", :install_if => Gem.win_platform?
\ No newline at end of file
diff --git a/Gemfile.lock b/Gemfile.lock
index 7381b9d..ca31866 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -90,12 +90,13 @@ GEM
     middleman-syntax (3.0.0)
       middleman-core (>= 3.2)
       rouge (~> 2.0)
-    mini_portile2 (2.3.0)
+    mini_portile2 (2.8.0)
     minitest (5.10.1)
-    nokogiri (1.8.5)
-      mini_portile2 (~> 2.3.0)
-    nokogiri (1.8.5-x64-mingw32)
-      mini_portile2 (~> 2.3.0)
+    nokogiri (1.13.5)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
+    nokogiri (1.13.5-x64-mingw32)
+      racc (~> 1.4)
     padrino-helpers (0.13.3.3)
       i18n (~> 0.6, >= 0.6.7)
       padrino-support (= 0.13.3.3)
@@ -104,6 +105,7 @@ GEM
       activesupport (>= 3.1)
     parallel (1.10.0)
     public_suffix (2.0.5)
+    racc (1.6.0)
     rack (2.0.1)
     rack-livereload (0.3.17)
       rack
@@ -136,7 +138,7 @@ DEPENDENCIES
   middleman-livereload (~> 3.4.3)
   middleman-sprockets (~> 4.1.0)
   middleman-syntax (~> 3.0.0)
-  nokogiri (~> 1.8.1)
+  nokogiri (~> 1.13.5)
   redcarpet (~> 3.4.0)
   rouge (~> 2.0.5)
   wdm (~> 0.1.0)