diff --git a/Gemfile b/Gemfile
index 62493fd..07faf7c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,7 @@
 source "https://rubygems.org"
 gem "opengl-bindings"
-gem "cyberarm_engine"
\ No newline at end of file
+gem "cyberarm_engine"
+
+group(:packaging) do
+  gem "ocra"
+end
\ No newline at end of file
diff --git a/Gemfile.lock b/Gemfile.lock
index 282bb33..043f741 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,15 +4,19 @@ GEM
     cyberarm_engine (0.10.2)
       gosu (~> 0.14.0)
     gosu (0.14.5)
+    gosu (0.14.5-x64-mingw32)
     gosu (0.14.5-x86-mingw32)
+    ocra (1.3.10)
     opengl-bindings (1.6.9)
 
 PLATFORMS
   ruby
+  x64-mingw32
   x86-mingw32
 
 DEPENDENCIES
   cyberarm_engine
+  ocra
   opengl-bindings
 
 BUNDLED WITH