diff --git a/cyberarm_engine.gemspec b/cyberarm_engine.gemspec
index 054bb42..be77737 100644
--- a/cyberarm_engine.gemspec
+++ b/cyberarm_engine.gemspec
@@ -28,7 +28,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.add_dependency "gosu", "~> 0.14.0"
+  spec.add_dependency "gosu", "~> 0.15.0"
 
   spec.add_development_dependency "bundler", "~> 1.16"
   spec.add_development_dependency "rake", "~> 10.0"
diff --git a/lib/cyberarm_engine/version.rb b/lib/cyberarm_engine/version.rb
index 801574c..dddbbfe 100644
--- a/lib/cyberarm_engine/version.rb
+++ b/lib/cyberarm_engine/version.rb
@@ -1,4 +1,4 @@
 module CyberarmEngine
   NAME    = "InDev"
-  VERSION = "0.12.1"
+  VERSION = "0.13.0"
 end