diff --git a/pom.xml b/pom.xml
index bbcc16a..6a7668d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>com.chatopera.bot</groupId>
     <artifactId>sdk</artifactId>
-    <version>3.5.3</version>
+    <version>3.5.4</version>
 
     <name>sdk</name>
     <description>Java SDK for Chatopera Bot Service. Get Java API Docs at https://chatopera.github.io/chatopera-sample-java/apidocs/</description>
diff --git a/src/main/java/com/chatopera/bot/sdk/Chatbot.java b/src/main/java/com/chatopera/bot/sdk/Chatbot.java
index a62ff81..c9a5fb8 100644
--- a/src/main/java/com/chatopera/bot/sdk/Chatbot.java
+++ b/src/main/java/com/chatopera/bot/sdk/Chatbot.java
@@ -200,7 +200,7 @@ public Response command(final String method, String path, final JSONObject paylo
                     }
                     break;
                 case "DELETE":
-                    if(payload != null){
+                    if (payload != null) {
                         result = RestAPI.delete(url.toString(), auth(method, fullPath.toString()), payload);
                     } else {
                         result = RestAPI.delete(url.toString(), auth(method, fullPath.toString()));
@@ -232,8 +232,8 @@ public Response command(final String method, String path, final JSONObject paylo
             }
         }
 
-        if (result.has("msg")){
-            if(result.isNull("msg")){
+        if (result.has("msg")) {
+            if (result.isNull("msg")) {
                 resp.setMsg("");
             } else {
                 resp.setMsg(result.getString("msg"));
@@ -253,8 +253,11 @@ public Response command(final String method, String path, final JSONObject paylo
         if (result.has("total_page"))
             resp.setTotal_page(result.getInt("total_page"));
 
-        resp.setStatus(result.optJSONObject("status", new JSONObject()));
-
+        if (result.has("status")) {
+            resp.setStatus(result.optJSONObject("status", new JSONObject()));
+        } else {
+            resp.setStatus(null);
+        }
         return resp;
     }
 
diff --git a/src/main/java/com/chatopera/bot/sdk/TrainMgr.java b/src/main/java/com/chatopera/bot/sdk/TrainMgr.java
index 52a7bb7..c484b2c 100644
--- a/src/main/java/com/chatopera/bot/sdk/TrainMgr.java
+++ b/src/main/java/com/chatopera/bot/sdk/TrainMgr.java
@@ -53,7 +53,7 @@ public TrainMgr(final String clientId, final String clientSecret) throws Malform
      */
     public Status getStatus() throws ChatbotException, ResourceInvalidException {
         Response resp = this.chatbot.command("GET", "/clause/devver/build");
-        if (resp.getRc() == 0) {
+        if (resp.getStatus() != null && resp.getStatus().has("retrain")) {
             Status status = new Status(resp.getStatus());
             return status;
         } else {