diff --git a/fluent-plugin-aws-elasticsearch-service.gemspec b/fluent-plugin-aws-elasticsearch-service.gemspec
index c616084..094b651 100644
--- a/fluent-plugin-aws-elasticsearch-service.gemspec
+++ b/fluent-plugin-aws-elasticsearch-service.gemspec
@@ -5,7 +5,7 @@ $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 
 Gem::Specification.new do |spec|
   spec.name          = "fluent-plugin-aws-elasticsearch-service"
-  spec.version       = "0.1.7-alpha"
+  spec.version       = "0.1.7"
   spec.authors       = ["atomita"]
   spec.email         = ["sleeping.cait.sith+gh@gmail.com"]