diff --git a/Gemfile b/Gemfile
index 0d6b6ede..29be6e13 100644
--- a/Gemfile
+++ b/Gemfile
@@ -57,6 +57,7 @@ gem 'nokogiri'
 gem 'rss'
 gem 'webp-ffi'
 gem 'rszr'
+gem 'zip_tricks'
 
 group :development, :test do
   gem 'pry'
diff --git a/Gemfile.lock b/Gemfile.lock
index 9ef6a41b..21244358 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -308,6 +308,7 @@ GEM
       webrick
     xpath (3.2.0)
       nokogiri (~> 1.8)
+    zip_tricks (5.6.0)
     zipruby (0.3.6)
 
 PLATFORMS
@@ -388,6 +389,7 @@ DEPENDENCIES
   webp-ffi
   will_paginate
   xmlrpc
+  zip_tricks
   zipruby
 
 BUNDLED WITH