diff --git a/test/test.ts b/test/test.ts
index 8fc1ea4..5e66a0c 100644
--- a/test/test.ts
+++ b/test/test.ts
@@ -30,4 +30,8 @@ tap.test('should create a valid instance of SmartAcme', async () => {
   // await smartAcmeInstance.getCertificateForDomain('bleu.de');
 });
 
+tap.test('should stop correctly', async () => {
+  await smartAcmeInstance.stop();
+});
+
 tap.start();
diff --git a/ts/smartacme.classes.smartacme.ts b/ts/smartacme.classes.smartacme.ts
index 642c5a4..09413d5 100644
--- a/ts/smartacme.classes.smartacme.ts
+++ b/ts/smartacme.classes.smartacme.ts
@@ -1,4 +1,5 @@
 import * as plugins from './smartacme.plugins';
+import { Cert } from './smartacme.classes.cert';
 import { CertManager } from './smartacme.classes.certmanager';
 
 import * as interfaces from './interfaces';
@@ -112,9 +113,11 @@ export class SmartAcme {
     });
   }
 
-  public async stop() {};
+  public async stop() {
+    await this.certmanager.smartdataDb.close();
+  }
 
-  public async getCertificateForDomain(domainArg: string) {
+  public async getCertificateForDomain(domainArg: string): Promise<Cert> {
     const domain = domainArg;
 
     const retrievedCertificate = await this.certmanager.retrieveCertificate(domain);