diff --git a/src/main/java/xyz/zhouxy/plusone/commons/util/IdWorker.java b/src/main/java/xyz/zhouxy/plusone/commons/util/IdWorker.java
index 47c5ef0..6ed543b 100644
--- a/src/main/java/xyz/zhouxy/plusone/commons/util/IdWorker.java
+++ b/src/main/java/xyz/zhouxy/plusone/commons/util/IdWorker.java
@@ -161,7 +161,7 @@ public class IdWorker {
      * use lowest 10 bit of available MAC as workerId
      * @return workerId
      * @throws SocketException 
-     * @throws Exception when there is no available mac found
+     * @throws NoAvailableMacFoundException when there is no available mac found
      */
     private static long generateWorkerIdBaseOnMac() throws SocketException, NoAvailableMacFoundException {
         Enumeration<NetworkInterface> all = NetworkInterface.getNetworkInterfaces();
@@ -185,4 +185,4 @@ public class IdWorker {
     private static long generateRandomWorkerId() {
         return ThreadLocalRandom.current().nextInt(MAX_WORKER_ID + 1);
     }
-}
\ No newline at end of file
+}