diff --git a/test/test.cronmanager.ts b/test/test.cronmanager.ts
index 4032fc2..25cb171 100644
--- a/test/test.cronmanager.ts
+++ b/test/test.cronmanager.ts
@@ -11,16 +11,38 @@ tap.test('should create a valid instance of cronmanager', async () => {
 
 tap.test('should create a valid cronJon', async (tools) => {
   const done = tools.defer();
+  const done2 = tools.defer();
+  const done3 = tools.defer();
   let counter = 0;
-  testCronManager.addCronjob('*/2 * * * * *', () => {
+  let counter2 = 0;
+  let counter3 = 0;
+  const cronJob = testCronManager.addCronjob('*/2 * * * * *', async () => {
     if (counter === 10) {
+      testCronManager.removeCronjob(cronJob);
       done.resolve();
     }
     counter++;
-    console.log(`hey ${counter}`);
+    console.log(`${new Date().getSeconds()} hey ${counter} -> runs every 2 seconds`);
+  });
+  const cronJob2 = testCronManager.addCronjob('*/3 * * * * *', async () => {
+    if (counter2 === 10) {
+      testCronManager.removeCronjob(cronJob2);
+      done2.resolve();
+    }
+    counter2++;
+    console.log(`${new Date().getSeconds()} hey ${counter2} -> runs every 3 seconds`);
+  });
+  const cronJob3 = testCronManager.addCronjob('*/4 * * * * *', async () => {
+    if (counter3 === 10) {
+      done3.resolve();
+    }
+    counter3++;
+    console.log(`${new Date().getSeconds()} hey ${counter3} -> runs every 4 seconds`);
   });
   testCronManager.start();
   await done.promise;
+  await done2.promise;
+  await done3.promise;
   testCronManager.stop();
 });
 
diff --git a/ts/smarttime.classes.cronjob.ts b/ts/smarttime.classes.cronjob.ts
index cadbbb1..efcabe4 100644
--- a/ts/smarttime.classes.cronjob.ts
+++ b/ts/smarttime.classes.cronjob.ts
@@ -21,11 +21,14 @@ export class CronJob {
    */
   public checkExecution(): number {
     if (this.nextExecutionUnix === 0) {
-      this.nextExecutionUnix = this.croner.msToNext();
+      this.nextExecutionUnix = Date.now() + this.croner.msToNext();
     }
     if (Date.now() > this.nextExecutionUnix) {
-      this.jobFunction();
-      this.nextExecutionUnix = this.croner.msToNext();
+      const maybePromise = this.jobFunction();
+      if (maybePromise instanceof Promise) {
+        maybePromise.catch(e => console.log(e));
+      }
+      this.nextExecutionUnix = Date.now() + this.croner.msToNext();
     }
     return this.nextExecutionUnix;
   }
diff --git a/ts/smarttime.classes.cronmanager.ts b/ts/smarttime.classes.cronmanager.ts
index 4673f18..a39a60f 100644
--- a/ts/smarttime.classes.cronmanager.ts
+++ b/ts/smarttime.classes.cronmanager.ts
@@ -9,7 +9,7 @@ export class CronManager {
 
   constructor() {}
 
-  public addCronjob(cronIdentifierArg: string, cronFunctionArg: () => any) {
+  public addCronjob(cronIdentifierArg: string, cronFunctionArg: () => Promise<void>) {
     const newCronJob = new CronJob(this, cronIdentifierArg, cronFunctionArg);
     this.cronjobs.add(newCronJob);
     if (this.status === 'started') {
@@ -33,17 +33,13 @@ export class CronManager {
       for (const cronJob of this.cronjobs.getArray()) {
         cronJob.start();
       }
-      this.executionTimeout = new plugins.smartdelay.Timeout(0);
-
-      // recursion
-      const runCheckExecution = () => {
-        console.log(
-          `Next CronJob scheduled in ${this.executionTimeout.getTimeLeft()} milliseconds`
-        );
-        this.executionTimeout.promise.then(() => {
+      const runCronCycle = async () => {
+        this.executionTimeout = new plugins.smartdelay.Timeout(0);
+        do {
           let timeToNextOverallExecution: number;
           for (const cronJob of this.cronjobs.getArray()) {
-            const timeToNextJobExecution = cronJob.checkExecution();
+            const nextExecutionTime = cronJob.checkExecution();
+            const timeToNextJobExecution = nextExecutionTime - Date.now();
             if (
               timeToNextJobExecution < timeToNextOverallExecution ||
               !timeToNextOverallExecution
@@ -52,11 +48,13 @@ export class CronManager {
             }
           }
           this.executionTimeout = new plugins.smartdelay.Timeout(timeToNextOverallExecution);
-          runCheckExecution();
-        });
+          console.log(
+            `Next CronJob scheduled in ${this.executionTimeout.getTimeLeft()} milliseconds`
+          );
+          await this.executionTimeout.promise;
+        } while (this.status === 'started');
       };
-
-      runCheckExecution();
+      runCronCycle();
     }
   }