diff --git a/internal/util/rsa_util.go b/internal/util/rsa_util.go
index 9d94590..c0517df 100644
--- a/internal/util/rsa_util.go
+++ b/internal/util/rsa_util.go
@@ -1,6 +1,7 @@
 package util
 
 import (
+	"crypto/rand"
 	"crypto/rsa"
 	"crypto/x509"
 	"encoding/base64"
@@ -22,9 +23,9 @@ func EncryptWithPublicKey(data string, pemBytes []byte) (string, error) {
 	if !ok {
 		return "", errors.New("not RSA public key")
 	}
-	ciphertext, err := rsa.EncryptPKCS1v15(nil, pubKey, []byte(data))
-	if err != nil {
-		return "", err
-	}
-	return base64.StdEncoding.EncodeToString(ciphertext), nil
+    ciphertext, err := rsa.EncryptPKCS1v15(rand.Reader, pubKey, []byte(data))
+    if err != nil {
+        return "", err
+    }
+    return base64.StdEncoding.EncodeToString(ciphertext), nil
 }