diff --git a/example/discord/Readme.md b/example/discord/Readme.md
index f2e3e08..fcc7100 100644
--- a/example/discord/Readme.md
+++ b/example/discord/Readme.md
@@ -22,5 +22,8 @@ func main() {
 	logger.Debug("test")
 	logger.NoSendInfo()
 	logger.Infof("test %s", "info")
+
+    logger.SetErrorWebhook(DiscordErrorWebhookURL)
+	logger.Error("test")
 }
 ```
\ No newline at end of file
diff --git a/example/discord/main.go b/example/discord/main.go
index bfbb30c..cf5257d 100644
--- a/example/discord/main.go
+++ b/example/discord/main.go
@@ -4,7 +4,8 @@ import "github.com/seipan/loghook"
 
 var (
 	// DiscordWebhookURL is a webhook url for discord.
-	DiscordWebhookURL = "https://discord.com/api/webhooks/xxxxxxxx/xxxxxxxx"
+	DiscordWebhookURL      = "https://discord.com/api/webhooks/xxxxxxxx/xxxxxxxx"
+	DiscordErrorWebhookURL = "https://discord.com/api/webhooks/xxxxxxxx/xxxxxxxx"
 )
 
 func main() {
@@ -19,4 +20,7 @@ func main() {
 	logger.Debug("test")
 	logger.NoSendInfo()
 	logger.Infof("test %s", "info")
+
+	logger.SetErrorWebhook(DiscordErrorWebhookURL)
+	logger.Error("test")
 }
diff --git a/example/slack/Readme.md b/example/slack/Readme.md
index 57607eb..dab8816 100644
--- a/example/slack/Readme.md
+++ b/example/slack/Readme.md
@@ -1,5 +1,5 @@
 ## Example
-
+Create a WebhookuURL using Incoming Webhook
 ```go
 package slack
 
@@ -22,6 +22,9 @@ func main() {
 	logger.Debug("test")
 	logger.NoSendInfo()
 	logger.Infof("test %s", "info")
+
+	logger.SetErrorWebhook(SlackErrorWebhookURL)
+	logger.Error("test")
 }
 
 ```
\ No newline at end of file
diff --git a/example/slack/main.go b/example/slack/main.go
index 3fa7b52..5048c54 100644
--- a/example/slack/main.go
+++ b/example/slack/main.go
@@ -4,7 +4,8 @@ import "github.com/seipan/loghook"
 
 var (
 	// DiscordWebhookURL is a webhook url for discord.
-	SlackWebhookURL = "https://hooks.slack.com/services/xxxxx/xxxx/xxxxxxxxx"
+	SlackWebhookURL      = "https://hooks.slack.com/services/xxxxx/xxxx/xxxxxxxxx"
+	SlackErrorWebhookURL = "https://hooks.slack.com/services/xxxxx/xxxx/xxxxxxxxx"
 )
 
 func main() {
@@ -19,4 +20,7 @@ func main() {
 	logger.Debug("test")
 	logger.NoSendInfo()
 	logger.Infof("test %s", "info")
+
+	logger.SetErrorWebhook(SlackErrorWebhookURL)
+	logger.Error("test")
 }