diff --git a/README.md b/README.md
index 9d31f28..47b818a 100644
--- a/README.md
+++ b/README.md
@@ -45,6 +45,7 @@ A push notification server using [Gin](https://github.com/gin-gonic/gin) framewo
 * Support `/api/stat/app` show notification success and failure counts.
 * Support `/api/config` show your [YAML](https://en.wikipedia.org/wiki/YAML) config.
 * Support store app stat to memory, [Redis](http://redis.io/) or [BoltDB](https://github.com/boltdb/bolt).
+* Support `p12` or `pem` formtat of iOS certificate file.
 
 See the [YAML config example](config/config.yml):
 
diff --git a/gorush/notification.go b/gorush/notification.go
index eb7d12e..ba62c99 100644
--- a/gorush/notification.go
+++ b/gorush/notification.go
@@ -154,8 +154,6 @@ func InitAPNSClient() error {
 			err = errors.New("Wrong Certificate key extension.")
 		}
 
-		// CertificatePemIos, err = certificate.FromPemFile(PushConf.Ios.PemPath, PushConf.Ios.Password)
-
 		if err != nil {
 			LogError.Error("Cert Error:", err.Error())