diff --git a/ch03.md b/ch03.md
index aa9f215..d3f71c3 100644
--- a/ch03.md
+++ b/ch03.md
@@ -457,7 +457,8 @@ getblockchaininfo RPC命令之前介绍过了。getnetworkinfo显示比特币网
 
 ```
 $ bitcoin-cli getnetworkinfo
-  "version": 150000,
+{
+ "version": 150000,
   "subversion": "/Satoshi:0.15.0/",
   "protocolversion": 70015,
   "localservices": "000000000000000d",