diff --git a/src/main/java/com/ghostchu/btn/sparkle/module/analyse/AnalyseService.java b/src/main/java/com/ghostchu/btn/sparkle/module/analyse/AnalyseService.java
index 02244ef..ae70d52 100644
--- a/src/main/java/com/ghostchu/btn/sparkle/module/analyse/AnalyseService.java
+++ b/src/main/java/com/ghostchu/btn/sparkle/module/analyse/AnalyseService.java
@@ -103,6 +103,7 @@ public void cronUntrustedIPAddresses() throws InterruptedException {
                                     Duration.ofMinutes(30)
                             )
                             .stream()
+                            .distinct()
                             .map(IPUtil::toString)
                             .collect(Collectors.toList()))
                     .stream().map(IPUtil::toIPAddress)