diff --git a/km-rest/src/main/java/com/xiaojukeji/know/streaming/km/rest/api/v3/version/VersionController.java b/km-rest/src/main/java/com/xiaojukeji/know/streaming/km/rest/api/v3/version/VersionController.java
index 52cc4807..f8e00430 100644
--- a/km-rest/src/main/java/com/xiaojukeji/know/streaming/km/rest/api/v3/version/VersionController.java
+++ b/km-rest/src/main/java/com/xiaojukeji/know/streaming/km/rest/api/v3/version/VersionController.java
@@ -15,7 +15,6 @@ import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.*;
 
 import javax.servlet.http.HttpServletRequest;
-import javax.validation.Valid;
 import java.util.List;
 import java.util.Map;
 import java.util.SortedMap;