diff --git a/pom.xml b/pom.xml
index b7df125..20d0059 100644
--- a/pom.xml
+++ b/pom.xml
@@ -228,6 +228,13 @@
             <groupId>org.apache.fluo</groupId>
             <artifactId>fluo-api</artifactId>
             <version>1.2.0</version>
+            <!-- 排除掉低版本guava依赖,使用grpc的guava依赖 -->
+            <exclusions>
+                <exclusion>
+                    <groupId>com.google.guava</groupId>
+                    <artifactId>guava</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
 
 
diff --git a/src/main/java/com/baidu/xuper/config/Config.java b/src/main/java/com/baidu/xuper/config/Config.java
index a79d2ac..02c725d 100644
--- a/src/main/java/com/baidu/xuper/config/Config.java
+++ b/src/main/java/com/baidu/xuper/config/Config.java
@@ -17,7 +17,7 @@ public class Config {
     private ComplianceCheck complianceCheck;
     private String minNewChainAmount;
     private String crypto;
-    private Integer txVersion;
+    private Integer txVersion=1;
 
     private Config() {
     }
@@ -50,7 +50,12 @@ public static Config getInstance() {
 
     private static Config getConfigFromYaml() throws Exception {
         Yaml yaml = new Yaml(new Constructor(Config.class));
-        return yaml.load(new FileInputStream(new File(confFilePath)));
+        Config config= yaml.load(new FileInputStream(new File(confFilePath)));
+        if (config.getTxVersion()==null){
+            config.setTxVersion(1);
+        }
+        return config;
+        //return yaml.load(new FileInputStream(new File(confFilePath)));
     }
 
     private static Config getDefaultConfig() {