diff --git a/src/main/java/console/ConsoleInitializer.java b/src/main/java/console/ConsoleInitializer.java
index fde68e61..b33433ce 100644
--- a/src/main/java/console/ConsoleInitializer.java
+++ b/src/main/java/console/ConsoleInitializer.java
@@ -47,6 +47,9 @@ public class ConsoleInitializer {
     private LineReader lineReader;
     private boolean useV1TxService;
 
+    // v2 transaction extension
+    private byte[] extension;
+
     public LineReader getLineReader() {
         return lineReader;
     }
@@ -76,7 +79,6 @@ public void init(String[] args) throws ConfigException {
             logger.info("use v1 transaction service");
             useV1TxService = true;
         }
-        byte[] extension = null;
         if (args.length > 3 && "-v2".equals(args[3])) {
             logger.info("use v2 transaction service");
             useV1TxService = true;
@@ -294,6 +296,9 @@ public void switchGroup(String[] params) {
             this.consoleClientFace = new ConsoleClientImpl(client);
             this.precompiledFace = new PrecompiledImpl(client);
             this.consoleContractFace = new ConsoleContractImpl(client, useV1TxService);
+            if (extension != null) {
+                ((ConsoleContractImpl) this.consoleContractFace).setExtension(extension);
+            }
             this.collaborationFace = new CollaborationImpl(client);
             this.authFace = new AuthImpl(client);
             JlineUtils.switchGroup(client);
@@ -368,6 +373,9 @@ public void loadAccount(String[] params) {
         this.consoleClientFace = new ConsoleClientImpl(client);
         this.precompiledFace = new PrecompiledImpl(client);
         this.consoleContractFace = new ConsoleContractImpl(client, useV1TxService);
+        if (extension != null) {
+            ((ConsoleContractImpl) this.consoleContractFace).setExtension(extension);
+        }
         this.collaborationFace = new CollaborationImpl(client);
         this.authFace = new AuthImpl(client);
         System.out.println("Load account " + params[1] + " success!");