diff --git a/plusone-system/plusone-system-domain/src/main/java/xyz/zhouxy/plusone/system/domain/model/account/Account.java b/plusone-system/plusone-system-domain/src/main/java/xyz/zhouxy/plusone/system/domain/model/account/Account.java
index e19ab3a..2946951 100644
--- a/plusone-system/plusone-system-domain/src/main/java/xyz/zhouxy/plusone/system/domain/model/account/Account.java
+++ b/plusone-system/plusone-system-domain/src/main/java/xyz/zhouxy/plusone/system/domain/model/account/Account.java
@@ -5,8 +5,6 @@ import java.util.HashSet;
 import java.util.Optional;
 import java.util.Set;
 
-import javax.annotation.Nonnull;
-
 import lombok.Getter;
 import lombok.Setter;
 import lombok.ToString;
@@ -115,7 +113,7 @@ public class Account extends AggregateRoot<Long> implements IWithVersion {
         addDomainEvent(new AccountRolesBound(this));
     }
 
-    public boolean checkPassword(@Nonnull String password) {
+    public boolean checkPassword(String password) {
         return this.password.check(password);
     }