diff --git a/spring-cloud-alibaba-sidecar/src/main/java/com/alibaba/cloud/sidecar/SidecarProperties.java b/spring-cloud-alibaba-sidecar/src/main/java/com/alibaba/cloud/sidecar/SidecarProperties.java
index f02931a1..b95f9189 100644
--- a/spring-cloud-alibaba-sidecar/src/main/java/com/alibaba/cloud/sidecar/SidecarProperties.java
+++ b/spring-cloud-alibaba-sidecar/src/main/java/com/alibaba/cloud/sidecar/SidecarProperties.java
@@ -52,7 +52,7 @@ public class SidecarProperties {
 	private URI healthCheckUrl;
 
 	/**
-	 * interval of health check
+	 * interval of health check.
 	 */
 	private long healthCheckInterval = 30000L;