diff --git a/packages/backend/src/config.ts b/packages/backend/src/config.ts
index ef59a80950..b25554b229 100644
--- a/packages/backend/src/config.ts
+++ b/packages/backend/src/config.ts
@@ -258,7 +258,7 @@ export function loadConfig(): Config {
 		clientEntry: clientManifest['src/_boot_.ts'],
 		clientManifestExists: clientManifestExists,
 		perChannelMaxNoteCacheCount: config.perChannelMaxNoteCacheCount ?? 1000,
-		perUserNotificationsMaxCount: config.perUserNotificationsMaxCount ?? 300,
+		perUserNotificationsMaxCount: config.perUserNotificationsMaxCount ?? 500,
 		deactivateAntennaThreshold: config.deactivateAntennaThreshold ?? (1000 * 60 * 60 * 24 * 7),
 		pidFile: config.pidFile,
 	};