diff --git a/jetlinks-components/network-component/tcp-component/src/main/java/org/jetlinks/community/network/tcp/parser/strateies/ScriptPayloadParserBuilder.java b/jetlinks-components/network-component/tcp-component/src/main/java/org/jetlinks/community/network/tcp/parser/strateies/ScriptPayloadParserBuilder.java
index d191cd89..0ac7d01d 100755
--- a/jetlinks-components/network-component/tcp-component/src/main/java/org/jetlinks/community/network/tcp/parser/strateies/ScriptPayloadParserBuilder.java
+++ b/jetlinks-components/network-component/tcp-component/src/main/java/org/jetlinks/community/network/tcp/parser/strateies/ScriptPayloadParserBuilder.java
@@ -45,7 +45,7 @@ public class ScriptPayloadParserBuilder implements PayloadParserBuilderStrategy
         String script = config.getString("script")
                               .orElseThrow(() -> new IllegalArgumentException("script不能为空"));
         String lang = config.getString("lang")
-                            .orElseThrow(() -> new IllegalArgumentException("lang不能为空"));
+                            .orElse("js");
 
         CompiledScript compiledScript = Scripts
             .getFactory(lang)