diff --git a/keywords.txt b/keywords.txt
index ae4d434..e6cf49e 100644
--- a/keywords.txt
+++ b/keywords.txt
@@ -8,10 +8,10 @@ UCloudIoTSDK  KEYWORD1
 # Methods and Functions (KEYWORD2)
 
 mqtt_connect   KEYWORD2
-mqttYield         KEYWORD2
-mqtt_status      KEYWORD2
-publish             KEYWORD2
-subscribe          KEYWORD2
+mqttYield      KEYWORD2
+mqtt_status    KEYWORD2
+publish        KEYWORD2
+subscribe      KEYWORD2
 
 # Constants (LITERAL1)