diff --git a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/sal/LocalDeviceServiceImpl.java b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/sal/LocalDeviceServiceImpl.java
index 06e955df..f80e8e5d 100644
--- a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/sal/LocalDeviceServiceImpl.java
+++ b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/sal/LocalDeviceServiceImpl.java
@@ -20,10 +20,10 @@ public class LocalDeviceServiceImpl implements DeviceService {
         }
     };*/
     private static final Cache<String, Device> deviceCache = CacheBuilder.newBuilder().
-            expireAfterWrite(90, TimeUnit.MINUTES).build();
+            expireAfterAccess(90, TimeUnit.MINUTES).build();
 
     private static final Cache<String, List<Device>> subDeviceCache = CacheBuilder.newBuilder().
-            expireAfterWrite(10, TimeUnit.MINUTES).build();
+            expireAfterAccess(10, TimeUnit.MINUTES).build();
 
     @Resource(name = "db")
     private DeviceService delegate;