diff --git a/btc.js b/btc.js
index 7167d40..4cea30b 100644
--- a/btc.js
+++ b/btc.js
@@ -10,7 +10,8 @@ const BTC_TXFEE = 30
 
 class BTC {
   constructor (privateKey) {
-    if (!ticc.is_seckey(privateKey)) throw new Error('Invalid PrivateKey')
+    if (!ticc.is_seckey({ seckey: privateKey }))
+      throw new Error('Invalid PrivateKey')
     var publicKey = ticc.seckey_to_pubkey(privateKey)
     Object.defineProperties(this, {
       privateKey: {
diff --git a/tic.js b/tic.js
index 5f7bd98..396bc0a 100644
--- a/tic.js
+++ b/tic.js
@@ -8,7 +8,7 @@ const TIC_NODE = require('./netConfig').TIC_NODE
 
 class TIC {
   constructor (seckey, option = {}) {
-    if (!seckey || !ticc.is_seckey(seckey)) throw 'ERROR:Invalid Seckey'
+    if (!seckey || !ticc.is_seckey({ seckey })) throw 'ERROR:Invalid Seckey'
     Object.defineProperties(this, {
       seckey: {
         value: seckey,