diff --git a/Gemfile b/Gemfile
index 4d5e3146..37ec8e26 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ gem 'sitemap_generator', :path => './'
 
 group :development, :test do
   gem 'mocha'
-  gem 'nokogiri', '=1.5.10' # last release to support Ruby 1.8.7
+  gem 'nokogiri', '1.10.10' # last release to support Ruby 1.8.7
   gem 'rake'
   gem 'rspec'
   #gem 'ruby-debug19', :require => 'ruby-debug'
diff --git a/Gemfile.lock b/Gemfile.lock
index 2b326f13..2fe1a7b4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,5 +1,5 @@
 PATH
-  remote: ./
+  remote: .
   specs:
     sitemap_generator (5.0.5)
       builder
@@ -10,9 +10,11 @@ GEM
     builder (3.0.0)
     diff-lcs (1.1.3)
     metaclass (0.0.1)
+    mini_portile2 (2.4.0)
     mocha (0.10.0)
       metaclass (~> 0.0.1)
-    nokogiri (1.5.10)
+    nokogiri (1.10.10)
+      mini_portile2 (~> 2.4.0)
     rake (10.0.4)
     rspec (2.8.0)
       rspec-core (~> 2.8.0)
@@ -29,7 +31,7 @@ PLATFORMS
 DEPENDENCIES
   builder
   mocha
-  nokogiri (= 1.5.10)
+  nokogiri (= 1.10.10)
   rake
   rspec
   sitemap_generator!