diff --git a/src/main/java/com/iflytop/handacid/app/core/state/DeviceState.java b/src/main/java/com/iflytop/handacid/app/core/state/DeviceState.java
index b4555a0..5bc68c2 100644
--- a/src/main/java/com/iflytop/handacid/app/core/state/DeviceState.java
+++ b/src/main/java/com/iflytop/handacid/app/core/state/DeviceState.java
@@ -46,7 +46,7 @@ public class DeviceState {
     @Schema(description = "当前登录用户")
     private volatile User currentUser;
 
-    public JSONObject toJSON() {
+    public synchronized JSONObject toJSON() {
         JSONObject json = new JSONObject();
         json.putOnce("channelState", new ArrayList<>(channelStateMap.values()));
         json.putOnce("mode", mode);