build.gemspec in build-2.5.2 vs build.gemspec in build-2.6.0

@@ -15,12 +15,12 @@
 	spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
 	spec.require_paths = ["lib"]
 
   spec.required_ruby_version = '>= 2.0'
 	
-	spec.add_dependency "build-graph", "~> 2.0"
-	spec.add_dependency "build-environment", "~> 1.3"
-	spec.add_dependency "build-dependency", "~> 1.4"
+	spec.add_dependency "build-graph", "~> 2.1"
+	spec.add_dependency "build-environment", "~> 1.12"
+	spec.add_dependency "build-dependency", "~> 1.5"
 	spec.add_dependency "build-makefile", "~> 1.0"
 	
 	spec.add_dependency "graphviz", "~> 1.0"
 	spec.add_dependency "console", "~> 1.0"