diff --git a/packages/server/src/db/index.ts b/packages/server/src/db/index.ts
index 9809b40..aa88142 100644
--- a/packages/server/src/db/index.ts
+++ b/packages/server/src/db/index.ts
@@ -111,3 +111,15 @@ export function jsonDelete(table: string, key: string): void {
 export function getStoragePath(): string {
   return SQLITE_AVAILABLE ? DB_PATH : JSON_PATH
 }
+
+/**
+ * Close the SQLite database connection.
+ */
+export function closeDb(): void {
+  if (_db) {
+    try {
+      _db.close()
+    } catch { /* best-effort */ }
+    _db = null
+  }
+}
diff --git a/packages/server/src/services/shutdown.ts b/packages/server/src/services/shutdown.ts
index 2f8701f..302412d 100644
--- a/packages/server/src/services/shutdown.ts
+++ b/packages/server/src/services/shutdown.ts
@@ -1,4 +1,5 @@
 import { logger } from './logger'
+import { closeDb } from '../db'
 
 export function bindShutdown(server: any, groupChatServer?: any, chatRunServer?: any): void {
   let isShuttingDown = false
@@ -35,6 +36,7 @@ export function bindShutdown(server: any, groupChatServer?: any, chatRunServer?:
       logger.error(err, 'Shutdown error')
     }
 
+    closeDb()
     process.exit(0)
   }