diff --git a/Gemfile b/Gemfile
index 315aaf987..931c21996 100644
--- a/Gemfile
+++ b/Gemfile
@@ -26,4 +26,5 @@ gem 'codecov', :require => false
 # gem 'memory_profiler'
 
 # docs server
+gem "rubyzip", ">= 1.3.0"
 gem "github-pages", '198', group: :jekyll_plugins
diff --git a/Gemfile.lock b/Gemfile.lock
index fea75eed9..7221c271a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -251,7 +251,7 @@ GEM
       i18n
     ruby-progressbar (1.10.1)
     ruby_dep (1.5.0)
-    rubyzip (1.2.3)
+    rubyzip (2.0.0)
     safe_yaml (1.0.5)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
@@ -290,6 +290,7 @@ DEPENDENCIES
   rake
   rubocop (~> 0.75.0)
   rubocop-performance (~> 1.5.0)
+  rubyzip (>= 1.3.0)
   simplecov
 
 BUNDLED WITH