diff --git a/plusone-basic/plusone-basic-domain/src/main/java/xyz/zhouxy/plusone/constant/EntityStatus.java b/plusone-basic/plusone-basic-domain/src/main/java/xyz/zhouxy/plusone/constant/EntityStatus.java
index 752e31e..d3e887e 100644
--- a/plusone-basic/plusone-basic-domain/src/main/java/xyz/zhouxy/plusone/constant/EntityStatus.java
+++ b/plusone-basic/plusone-basic-domain/src/main/java/xyz/zhouxy/plusone/constant/EntityStatus.java
@@ -24,12 +24,10 @@ public final class EntityStatus extends Enumeration<EntityStatus> {
     private static final ValueSet<EntityStatus> VALUE_SET = new ValueSet<>(
             AVAILABLE, DISABLED);
 
-    @Nonnull
     public static EntityStatus of(int id) {
         return VALUE_SET.get(id);
     }
 
-    @Nonnull
     public static Collection<EntityStatus> constants() {
         return VALUE_SET.getValues();
     }
diff --git a/plusone-system/plusone-system-application/src/main/java/xyz/zhouxy/plusone/system/application/query/AccountQueries.java b/plusone-system/plusone-system-application/src/main/java/xyz/zhouxy/plusone/system/application/query/AccountQueries.java
index e1019e4..fa67800 100644
--- a/plusone-system/plusone-system-application/src/main/java/xyz/zhouxy/plusone/system/application/query/AccountQueries.java
+++ b/plusone-system/plusone-system-application/src/main/java/xyz/zhouxy/plusone/system/application/query/AccountQueries.java
@@ -2,6 +2,8 @@ package xyz.zhouxy.plusone.system.application.query;
 
 import java.util.List;
 
+import javax.annotation.Nonnull;
+
 import org.apache.ibatis.annotations.Mapper;
 
 import xyz.zhouxy.plusone.commons.util.PageDTO;
@@ -23,6 +25,7 @@ public interface AccountQueries {
         return PageDTO.of(content, total);
     }
 
+    @Nonnull
     List<AccountOverview> queryAccountOverview(AccountQueryParams queryParams);
 
     long count(AccountQueryParams queryParams);
diff --git a/plusone-system/plusone-system-domain/src/main/java/xyz/zhouxy/plusone/system/domain/model/account/AccountStatus.java b/plusone-system/plusone-system-domain/src/main/java/xyz/zhouxy/plusone/system/domain/model/account/AccountStatus.java
index b5e9ba7..540ceab 100644
--- a/plusone-system/plusone-system-domain/src/main/java/xyz/zhouxy/plusone/system/domain/model/account/AccountStatus.java
+++ b/plusone-system/plusone-system-domain/src/main/java/xyz/zhouxy/plusone/system/domain/model/account/AccountStatus.java
@@ -31,7 +31,6 @@ public final class AccountStatus extends Enumeration<AccountStatus> implements I
         return VALUE_SET.get(id);
     }
 
-    @Nonnull
     public static Collection<AccountStatus> constants() {
         return VALUE_SET.getValues();
     }
diff --git a/plusone-system/plusone-system-domain/src/main/java/xyz/zhouxy/plusone/system/domain/model/account/Sex.java b/plusone-system/plusone-system-domain/src/main/java/xyz/zhouxy/plusone/system/domain/model/account/Sex.java
index 2f66038..7a0d646 100644
--- a/plusone-system/plusone-system-domain/src/main/java/xyz/zhouxy/plusone/system/domain/model/account/Sex.java
+++ b/plusone-system/plusone-system-domain/src/main/java/xyz/zhouxy/plusone/system/domain/model/account/Sex.java
@@ -26,12 +26,10 @@ public final class Sex extends Enumeration<Sex> implements IValueObject {
 
     private static final ValueSet<Sex> VALUE_SET = new ValueSet<>(UNSET, MALE, FEMALE);
 
-    @Nonnull
     public static Sex of(int value) {
         return VALUE_SET.get(value);
     }
 
-    @Nonnull
     public static Collection<Sex> constants() {
         return VALUE_SET.getValues();
     }