diff --git a/skywalking-sniffer/skywalking-api/src/main/java/com/a/eye/skywalking/conf/Constants.java b/skywalking-sniffer/skywalking-api/src/main/java/com/a/eye/skywalking/conf/Constants.java
index 4fe66ee50..ba50822c6 100644
--- a/skywalking-sniffer/skywalking-api/src/main/java/com/a/eye/skywalking/conf/Constants.java
+++ b/skywalking-sniffer/skywalking-api/src/main/java/com/a/eye/skywalking/conf/Constants.java
@@ -1,10 +1,13 @@
 package com.a.eye.skywalking.conf;
 
+import com.a.eye.skywalking.util.TraceIdGenerator;
+
 public class Constants {
 	/**
-	 * 务必严格保持两位的version
+	 * This is the version, which will be the first segment of traceid.
+	 * Ref {@link TraceIdGenerator#generate()}
 	 */
-	public static int SDK_VERSION = 202016;
+	public static int SDK_VERSION = 212017;
 
     public static final String CONTEXT_DATA_SEGMENT_SPILT_CHAR = "#&";
 }