diff --git a/src/main/java/xyz/zhouxy/plusone/commons/annotation/StaticFactoryMethod.java b/src/main/java/xyz/zhouxy/plusone/commons/annotation/StaticFactoryMethod.java
index 137ea03..50ab70d 100644
--- a/src/main/java/xyz/zhouxy/plusone/commons/annotation/StaticFactoryMethod.java
+++ b/src/main/java/xyz/zhouxy/plusone/commons/annotation/StaticFactoryMethod.java
@@ -32,5 +32,5 @@ import java.lang.annotation.Target;
 @Target(ElementType.METHOD)
 @Retention(RetentionPolicy.RUNTIME)
 public @interface StaticFactoryMethod {
-    Class<?> value();
+    Class<?> value() default void.class;
 }