diff --git a/headless/index.js b/headless/index.js
index f1da85dec..c91b325f5 100644
--- a/headless/index.js
+++ b/headless/index.js
@@ -22,7 +22,7 @@ import {listDevices} from '../src/utils/listDevices.tsx';
 import setup from '../static/setup.js';
 import type {Store} from '../src/reducers/index.tsx';
 import {getPersistentPlugins} from '../src/utils/pluginUtils.tsx';
-import {serialize} from '../src/utils/serialization';
+import {serialize} from '../src/utils/serialization.tsx';
 import type BaseDevice from '../src/devices/BaseDevice.tsx';
 
 import {getStringFromErrorLike} from '../src/utils/index.tsx';
diff --git a/src/utils/__tests__/serialization.node.js b/src/utils/__tests__/serialization.node.js
index f8a4e1f39..b5b2bb0ed 100644
--- a/src/utils/__tests__/serialization.node.js
+++ b/src/utils/__tests__/serialization.node.js
@@ -5,7 +5,7 @@
  * @format
  */
 
-import {makeObjectSerializable, deserializeObject} from '../serialization';
+import {makeObjectSerializable, deserializeObject} from '../serialization.tsx';
 
 class TestObject extends Object {
   constructor(title: Object, map: ?Map<any, any>, set: ?Set<any>) {
diff --git a/src/utils/serialization.js b/src/utils/serialization.tsx
similarity index 95%
rename from src/utils/serialization.js
rename to src/utils/serialization.tsx
index a4b11ef9c..9845e7e3f 100644
--- a/src/utils/serialization.js
+++ b/src/utils/serialization.tsx
@@ -5,7 +5,7 @@
  * @format
  */
 
-import {Idler} from './Idler.tsx';
+import {Idler} from './Idler';
 export async function serialize(
   obj: Object,
   idler?: Idler,
@@ -16,16 +16,16 @@ export async function serialize(
   );
 }
 
-export function deserialize(str: string): Object {
+export function deserialize(str: string): any {
   return deserializeObject(JSON.parse(str));
 }
 
 function processArray(
   element: any,
-  array: [any],
+  array: Array<any>,
   stack: Array<any>,
   dict: Map<any, any>,
-): {childNeedsIteration: boolean, outputArr: Array<any>} {
+): {childNeedsIteration: boolean; outputArr: Array<any>} {
   // Adds the array item to the stack if it needs to undergo iteration to serialise it. Otherwise it adds the serialized version of the item to the memoization dict
   const outputArr = [];
   let childNeedsIteration = false;
@@ -74,7 +74,7 @@ export function processMapElement(
   obj: Map<any, any>,
   dict: Map<any, any>,
   stack: Array<any>,
-): {childNeedsIteration: boolean, outputArray: Array<any>} {
+): {childNeedsIteration: boolean; outputArray: Array<any>} {
   const arr = [];
   let childNeedsIteration = false;
   for (const item of [...obj]) {
@@ -95,7 +95,7 @@ export function processObjectToBeSerialized(
   element: Object,
   dict: Map<any, any>,
   stack: Array<any>,
-): {childNeedsIteration: boolean, outputObject: Object} {
+): {childNeedsIteration: boolean; outputObject: Object} {
   const array = Object.entries(element);
   let obj = {};
   let childNeedsIteration = false;
@@ -122,7 +122,7 @@ export async function makeObjectSerializable(
   obj: any,
   idler?: Idler,
   statusUpdate?: (msg: string) => void,
-): any {
+): Promise<any> {
   if (!(obj instanceof Object)) {
     return obj;
   }
@@ -213,6 +213,7 @@ export function deserializeObject(obj: any): any {
     switch (type) {
       case 'Map': {
         return new Map(
+          // @ts-ignore
           [...obj.data].map(item => [...item].map(deserializeObject)),
         );
       }