diff --git a/packages/backend/src/services/action.ts b/packages/backend/src/services/action.js
similarity index 93%
rename from packages/backend/src/services/action.ts
rename to packages/backend/src/services/action.js
index e873ab4b..33c45bcf 100644
--- a/packages/backend/src/services/action.ts
+++ b/packages/backend/src/services/action.js
@@ -9,13 +9,7 @@ import HttpError from '../errors/http';
 import EarlyExitError from '../errors/early-exit';
 import AlreadyProcessedError from '../errors/already-processed';
 
-type ProcessActionOptions = {
-  flowId: string;
-  executionId: string;
-  stepId: string;
-};
-
-export const processAction = async (options: ProcessActionOptions) => {
+export const processAction = async (options) => {
   const { flowId, stepId, executionId } = options;
 
   const flow = await Flow.query().findById(flowId).throwIfNotFound();
diff --git a/packages/backend/src/services/flow.ts b/packages/backend/src/services/flow.js
similarity index 91%
rename from packages/backend/src/services/flow.ts
rename to packages/backend/src/services/flow.js
index c7382d46..769fcd3b 100644
--- a/packages/backend/src/services/flow.ts
+++ b/packages/backend/src/services/flow.js
@@ -5,12 +5,7 @@ import AlreadyProcessedError from '../errors/already-processed';
 import HttpError from '../errors/http';
 import { logger } from '../helpers/logger';
 
-type ProcessFlowOptions = {
-  flowId: string;
-  testRun?: boolean;
-};
-
-export const processFlow = async (options: ProcessFlowOptions) => {
+export const processFlow = async (options) => {
   const { testRun, flowId } = options;
   const flow = await Flow.query().findById(flowId).throwIfNotFound();
   const triggerStep = await flow.getTriggerStep();
diff --git a/packages/backend/src/services/test-run.ts b/packages/backend/src/services/test-run.js
similarity index 85%
rename from packages/backend/src/services/test-run.ts
rename to packages/backend/src/services/test-run.js
index 4d18028d..dd19b4af 100644
--- a/packages/backend/src/services/test-run.ts
+++ b/packages/backend/src/services/test-run.js
@@ -1,13 +1,9 @@
 import Step from '../models/step';
-import { processFlow } from '../services/flow';
-import { processTrigger } from '../services/trigger';
-import { processAction } from '../services/action';
+import { processFlow } from './flow';
+import { processTrigger } from './trigger';
+import { processAction } from './action';
 
-type TestRunOptions = {
-  stepId: string;
-};
-
-const testRun = async (options: TestRunOptions) => {
+const testRun = async (options) => {
   const untilStep = await Step.query()
     .findById(options.stepId)
     .throwIfNotFound();
diff --git a/packages/backend/src/services/trigger.ts b/packages/backend/src/services/trigger.js
similarity index 79%
rename from packages/backend/src/services/trigger.ts
rename to packages/backend/src/services/trigger.js
index 8cfdc974..f9c37432 100644
--- a/packages/backend/src/services/trigger.ts
+++ b/packages/backend/src/services/trigger.js
@@ -1,18 +1,9 @@
-import { IJSONObject, ITriggerItem } from '@automatisch/types';
 import Step from '../models/step';
 import Flow from '../models/flow';
 import Execution from '../models/execution';
 import globalVariable from '../helpers/global-variable';
 
-type ProcessTriggerOptions = {
-  flowId: string;
-  stepId: string;
-  triggerItem?: ITriggerItem;
-  error?: IJSONObject;
-  testRun?: boolean;
-};
-
-export const processTrigger = async (options: ProcessTriggerOptions) => {
+export const processTrigger = async (options) => {
   const { flowId, stepId, triggerItem, error, testRun } = options;
 
   const step = await Step.query().findById(stepId).throwIfNotFound();