diff --git a/index.js b/index.js
index de09c6f..513183a 100644
--- a/index.js
+++ b/index.js
@@ -105,6 +105,7 @@ class LightningClient extends EventEmitter {
 
         const callInt = ++this.reqcount;
         const sendObj = {
+            jsonrpc: '2.0',
             method,
             params: args,
             id: ''+callInt