diff --git a/config.json b/config.json
index 7845c37..d0c3e61 100644
--- a/config.json
+++ b/config.json
@@ -53,7 +53,7 @@
     "keystore": {
       "kdf": "pbkdf2",
       "cipherAlg": "aes-128-ctr",
-      "c": 262144
+      "c": 10000
     }
   },
   "cosmos": {
diff --git a/src/chains/iris/crypto.js b/src/chains/iris/crypto.js
index 8e75d77..69396e9 100644
--- a/src/chains/iris/crypto.js
+++ b/src/chains/iris/crypto.js
@@ -69,7 +69,7 @@ class IrisCrypto extends Crypto {
     }
 
     // @see:https://github.com/binance-chain/javascript-sdk/blob/master/src/crypto/index.js
-    exportKeystore(privateKeyHex,password){
+    exportKeystore(privateKeyHex,password,opts = {}){
         if (Utils.isEmpty(password) || password.length < 8){
             throw new Error("password's length must be greater than 8")
         }
@@ -78,14 +78,15 @@ class IrisCrypto extends Crypto {
         }
         const salt = Cryp.randomBytes(32);
         const iv = Cryp.randomBytes(16);
-        const cipherAlg = Config.iris.keystore.cipherAlg;
-        const kdf = Config.iris.keystore.kdf;
+        const cipherAlg = opts.cipherAlg ? opts.cipherAlg : Config.iris.keystore.cipherAlg;
+        const kdf = opts.kdf ? opts.kdf : Config.iris.keystore.kdf;
+        const c = opts.c ? opts.c : Config.iris.keystore.c;
         const address = this.import(privateKeyHex).address;
 
         const kdfparams = {
             dklen: 32,
             salt: salt.toString("hex"),
-            c: Config.iris.keystore.c,
+            c: c,
             prf: "hmac-sha256"
         };
         const derivedKey = Cryp.pbkdf2Sync(Buffer.from(password), salt, kdfparams.c, kdfparams.dklen, "sha256");
diff --git a/test/keystore.json b/test/keystore.json
index 2fee29e..1a58314 100644
--- a/test/keystore.json
+++ b/test/keystore.json
@@ -1 +1 @@
-{"version":"1","id":"65177bc2-8240-4024-8180-dd0b2d888903","address":"faa1ljemm0yznz58qxxs8xyak7fashcfxf5lssn6jm","crypto":{"ciphertext":"793acc81ed7d3f8aead7872f81cc7297e0527ab9ee87a24f8aa7de6a6b4072e9","cipherparams":{"iv":"7ebe22befa6b278f0f348fe9e3f7c524"},"cipher":"aes-128-ctr","kdf":"pbkdf2","kdfparams":{"dklen":32,"salt":"0fa96f07f73d3dfe2bff410b708de347080a326c898e2d5631af4d598e851401","c":262144,"prf":"hmac-sha256"},"mac":"15467c52ade57fd59200544612cccd2310825f8378d3f52228b52d07b56fbdba"}}
\ No newline at end of file
+{"version":"1","id":"cdda101b-cb44-4daf-8ed6-2a28b1289f6c","address":"faa1ljemm0yznz58qxxs8xyak7fashcfxf5lssn6jm","crypto":{"ciphertext":"03878b0196704fcfe13f56f9e12ff003c9c33b249e87b981ca0c8763ebe085f1","cipherparams":{"iv":"4848b511d0647dd572c4d1dfa9f65289"},"cipher":"aes-128-ctr","kdf":"pbkdf2","kdfparams":{"dklen":32,"salt":"06f0a45bd8f512d17349723da67d1eddbfac1cc497b6cbd2ad8a2852376d76db","c":10000,"prf":"hmac-sha256"},"mac":"f6c13e10eb8496847710bcedde95b5bf9aed85a834ce05c7b7eb01db05f26568"}}
\ No newline at end of file