diff --git a/README.md b/README.md
index 98d53b5..5414fcb 100644
--- a/README.md
+++ b/README.md
@@ -49,12 +49,14 @@ log:
 
 How to send push notification using `gopush` command? (Android or iOS)
 
+Download `gopush` binary file from [release page](https://github.com/appleboy/gopush/releases).
+
 ### Android
 
 Send single notification with the following command.
 
 ```bash
-$ ./gopush -android -m="your message" -k="API Key" -t="Device token"
+$ gopush -android -m="your message" -k="API Key" -t="Device token"
 ```
 
 * `-m`: Notification message.
@@ -66,7 +68,7 @@ $ ./gopush -android -m="your message" -k="API Key" -t="Device token"
 Send single notification with the following command.
 
 ```bash
-$ ./gopush -ios -m="your message" -i="API Key" -t="Device token"
+$ gopush -ios -m="your message" -i="API Key" -t="Device token"
 ```
 
 * `-m`: Notification message.
@@ -76,7 +78,7 @@ $ ./gopush -ios -m="your message" -i="API Key" -t="Device token"
 The default endpoint is APNs development. Please add `-production` flag for APNs production push endpoint.
 
 ```bash
-$ ./gopush -ios -m="your message" -i="API Key" -t="Device token" -production
+$ gopush -ios -m="your message" -i="API Key" -t="Device token" -production
 ```
 
 ## License
diff --git a/gorush.go b/gorush.go
index e88d93f..2fc3981 100644
--- a/gorush.go
+++ b/gorush.go
@@ -35,7 +35,7 @@ func main() {
 		gopush.PushConf, err = gopush.LoadConfYaml(*confPath)
 
 		if err != nil {
-			log.Printf("Unable to load yaml config file: '%v'", err)
+			log.Printf("Load yaml config file error: '%v'", err)
 
 			return
 		}
diff --git a/gorush/config.go b/gorush/config.go
index 67c6e92..bb0af4e 100644
--- a/gorush/config.go
+++ b/gorush/config.go
@@ -3,7 +3,6 @@ package gopush
 import (
 	"gopkg.in/yaml.v2"
 	"io/ioutil"
-	"log"
 )
 
 type ConfYaml struct {
@@ -89,16 +88,12 @@ func LoadConfYaml(confPath string) (ConfYaml, error) {
 	configFile, err := ioutil.ReadFile(confPath)
 
 	if err != nil {
-		log.Printf("Unable to read config file, path: '%s'", confPath)
-
 		return config, err
 	}
 
 	err = yaml.Unmarshal([]byte(configFile), &config)
 
 	if err != nil {
-		log.Printf("Unable to Unmarshal config file '%s'", confPath)
-
 		return config, err
 	}