diff --git a/pom.xml b/pom.xml
index 4d74f4f..b30703c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -38,7 +38,7 @@
 		<dependency>
 			<groupId>com.qcloud</groupId>
 			<artifactId>cos_api</artifactId>
-			<version>5.4.6</version>
+			<version>5.5.1</version>
 		</dependency>
 
 		<dependency>