diff --git a/test/crypto_test.js b/test/crypto_test.js
index 09c2010..fa52d4f 100644
--- a/test/crypto_test.js
+++ b/test/crypto_test.js
@@ -36,7 +36,7 @@ describe('CryPto test', function () {
     });
 
 
-    let chain_id = "irishub-test";
+    let chain_id = "rainbow-dev";
     let from = "faa1ljemm0yznz58qxxs8xyak7fashcfxf5lssn6jm";
     let gas = 200000;
     let account_number = 4;
@@ -53,7 +53,7 @@ describe('CryPto test', function () {
                 chain_id: chain_id,
                 from: from,
                 account_number: account_number,
-                sequence:0 ,
+                sequence:21 ,
                 fees: fees,
                 gas: gas,
                 memo: memo,
@@ -77,7 +77,7 @@ describe('CryPto test', function () {
                 chain_id: chain_id,
                 from: from,
                 account_number: account_number,
-                sequence:1 ,
+                sequence:15 ,
                 fees: fees,
                 gas: gas,
                 memo: memo,
diff --git a/util/utils.js b/util/utils.js
index 37e831f..a9c89b8 100644
--- a/util/utils.js
+++ b/util/utils.js
@@ -18,7 +18,7 @@ module.exports = class Utils {
                 } else if (obj[k] != null && typeof(obj[k]) === "object") {
                     tmp[k] = sort(obj[k]);
                 } else if (obj[k] != null && typeof(obj[k]) === "function") {
-                    tmp[k] = eval(obj[k].toString())
+                    tmp[k] = evil(obj[k].toString())
                 } else {
                     tmp[k] = new String(obj[k]).toString();
                 }
@@ -60,4 +60,9 @@ module.exports = class Utils {
             return str.toString()
         }
     }
-};
\ No newline at end of file
+};
+
+function evil(fn) {
+    let Fn = Function;
+    return new Fn('return ' + fn)();
+}
\ No newline at end of file