diff --git a/eladmin-common/src/main/java/me/zhengjie/config/RedisConfig.java b/eladmin-common/src/main/java/me/zhengjie/config/RedisConfig.java
index ae1ad846..c06df29b 100644
--- a/eladmin-common/src/main/java/me/zhengjie/config/RedisConfig.java
+++ b/eladmin-common/src/main/java/me/zhengjie/config/RedisConfig.java
@@ -39,12 +39,14 @@ import org.springframework.data.redis.core.RedisOperations;
 import org.springframework.data.redis.core.RedisTemplate;
 import org.springframework.data.redis.serializer.RedisSerializationContext;
 import org.springframework.data.redis.serializer.RedisSerializer;
+import reactor.util.annotation.Nullable;
 import java.nio.charset.Charset;
 import java.nio.charset.StandardCharsets;
 import java.time.Duration;
 import java.util.HashMap;
 import java.util.Map;
 
+
 /**
  * @author Zheng Jie
  * @date 2018-11-24