diff --git a/fog-azure-rm.gemspec b/fog-azure-rm.gemspec
index c9520c49..87c2d523 100755
--- a/fog-azure-rm.gemspec
+++ b/fog-azure-rm.gemspec
@@ -32,7 +32,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'azure_mgmt_traffic_manager', '~> 0.9.0'
   spec.add_dependency 'azure_mgmt_sql', '~> 0.9.0'
   spec.add_dependency 'azure_mgmt_key_vault', '~> 0.9.0'
-  spec.add_dependency 'azure-storage', '= 0.11.5.preview'
+  spec.add_dependency 'azure-storage', '= 0.12.2.preview'
   spec.add_dependency 'vhd', '0.0.4'
   spec.add_dependency 'mime-types', '~> 3.0'
 end