diff --git a/README.md b/README.md
index e122264..38004c4 100644
--- a/README.md
+++ b/README.md
@@ -86,7 +86,7 @@ iris.setBech32MainPrefix("iaa");
 ```js
 const cosmosjs = require("@cosmostation/cosmosjs");
 
-const chainId = "kava-3";
+const chainId = "kava-4";
 const kava = cosmosjs.network(lcdUrl, chainId);
 kava.setBech32MainPrefix("kava");
 ```
@@ -94,7 +94,7 @@ kava.setBech32MainPrefix("kava");
 ```js
 const cosmosjs = require("@cosmostation/cosmosjs");
 
-const chainId = "band-wenchang-mainnet";
+const chainId = "band-guanyu-mainnet";
 const band = cosmosjs.network(lcdUrl, chainId);
 band.setBech32MainPrefix("band");
 ```
diff --git a/example/band-protocol.js b/example/band-protocol.js
index 75c09d3..c2c0aad 100644
--- a/example/band-protocol.js
+++ b/example/band-protocol.js
@@ -2,7 +2,7 @@ const cosmosjs = require("../src");
 
 // [WARNING] This mnemonic is just for the demo purpose. DO NOT USE THIS MNEMONIC for your own wallet.
 const mnemonic = "swear buyer security impulse public stereo peasant correct cross tornado bid discover anchor float venture deal patch property cool wreck eight dwarf december surface";
-const chainId = "band-wenchang-mainnet";
+const chainId = "band-guanyu-mainnet";
 // Please install and use rest server separately. (https://hub.cosmos.network/master/resources/service-providers.html#setting-up-the-rest-server)
 const band = cosmosjs.network("YOUR REST SERVER URL", chainId);
 band.setBech32MainPrefix("band");
diff --git a/example/kava.js b/example/kava.js
index 5dc1d8e..f646b31 100644
--- a/example/kava.js
+++ b/example/kava.js
@@ -2,7 +2,7 @@ const cosmosjs = require("../src");
 
 // [WARNING] This mnemonic is just for the demo purpose. DO NOT USE THIS MNEMONIC for your own wallet.
 const mnemonic = "swear buyer security impulse public stereo peasant correct cross tornado bid discover anchor float venture deal patch property cool wreck eight dwarf december surface";
-const chainId = "kava-3";
+const chainId = "kava-4";
 // Please install and use rest server separately. (https://hub.cosmos.network/master/resources/service-providers.html#setting-up-the-rest-server)
 const kava = cosmosjs.network("YOUR REST SERVER URL", chainId);
 kava.setBech32MainPrefix("kava");
diff --git a/example/scrt.js b/example/scrt.js
index b0e4e3b..7cb6792 100644
--- a/example/scrt.js
+++ b/example/scrt.js
@@ -2,7 +2,7 @@ const cosmosjs = require("../src");
 
 // [WARNING] This mnemonic is just for the demo purpose. DO NOT USE THIS MNEMONIC for your own wallet.
 const mnemonic = "swear buyer security impulse public stereo peasant correct cross tornado bid discover anchor float venture deal patch property cool wreck eight dwarf december surface";
-const chainId = "secret-1";
+const chainId = "secret-2";
 // Please install and use rest server separately. (https://hub.cosmos.network/master/resources/service-providers.html#setting-up-the-rest-server)
 const scrt = cosmosjs.network("https://api-node.chainofsecrets.org", chainId);
 scrt.setBech32MainPrefix("secret");
diff --git a/package.json b/package.json
index 094bc49..a672ddd 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cosmostation/cosmosjs",
-  "version": "0.6.10",
+  "version": "0.6.11",
   "description": "A JavasSript Open Source Library for Cosmos Network, IRISnet, Kava, Band Protocol, Starname and Secret Network. (HTML developers can use /dist/cosmos.js)",
   "main": "./src/index.js",
   "repository": {