diff --git a/hutool-crypto/src/main/java/cn/hutool/crypto/SmUtil.java b/hutool-crypto/src/main/java/cn/hutool/crypto/SmUtil.java
index 2bc3a2236..7e9f5219c 100644
--- a/hutool-crypto/src/main/java/cn/hutool/crypto/SmUtil.java
+++ b/hutool-crypto/src/main/java/cn/hutool/crypto/SmUtil.java
@@ -190,7 +190,7 @@ public class SmUtil {
 	 * @param key 密钥
 	 * @return {@link SymmetricCrypto}
 	 */
-	public static SymmetricCrypto sm4(byte[] key) {
+	public static SM4 sm4(byte[] key) {
 		return new SM4(key);
 	}