diff --git a/components/footer.tsx b/components/footer.tsx
index b593008..cfc199b 100644
--- a/components/footer.tsx
+++ b/components/footer.tsx
@@ -1,4 +1,4 @@
-import React from 'react'
+import * as React from 'react'
 
 export default function Footer() {
   return (
diff --git a/components/header.tsx b/components/header.tsx
index 9eb593e..e90863e 100644
--- a/components/header.tsx
+++ b/components/header.tsx
@@ -1,4 +1,4 @@
-import React from 'react'
+import * as React from 'react'
 
 export default function Header() {
   return (
diff --git a/components/wizard/contact.tsx b/components/wizard/contact.tsx
index aeb549a..f3de283 100644
--- a/components/wizard/contact.tsx
+++ b/components/wizard/contact.tsx
@@ -1,9 +1,9 @@
-import React, { useContext } from 'react'
+import * as React from 'react'
+import { useContext } from 'react'
 import { WizardContext } from './context/wizardStore'
 import Required from './required'
 
 export default function Contact() {
-  // @ts-expect-error ts-migrate(2339) FIXME: Property 'state' does not exist on type '{}'.
   const { state, onChangeEvent } = useContext(WizardContext)
 
   const { name, email, street, zip, city } = state.formData
diff --git a/components/wizard/context/wizardStore.tsx b/components/wizard/context/wizardStore.tsx
index ab52efb..0be550d 100644
--- a/components/wizard/context/wizardStore.tsx
+++ b/components/wizard/context/wizardStore.tsx
@@ -1,4 +1,5 @@
-import React, { useReducer, useEffect } from 'react'
+import * as React from 'react'
+import { useReducer, useEffect } from 'react'
 
 import {
   storeBookingData,
@@ -6,8 +7,52 @@ import {
   clearBookingData,
 } from '../../../helpers/storage'
 
-// @ts-expect-error ts-migrate(2554) FIXME: Expected 1 arguments, but got 0.
-export const WizardContext = React.createContext()
+interface WizardFormData {
+  startDate: string
+  endDate: string
+  purpose: string
+  org: string
+  destination: string
+  name: string
+  email: string
+  street: string
+  zip: string
+  city: string
+}
+
+interface Booking {
+  uuid: string
+}
+
+interface WizardStoreState {
+  postData?: boolean
+  postDataError?: string
+  postDataSuccess?: boolean
+  formData: WizardFormData
+  formDataChanged: string[]
+  booking?: Booking
+  dataStored: boolean
+  dataStoredLoaded: boolean
+}
+
+interface WizardStore {
+  state: WizardStoreState
+  dispatch: React.Dispatch<WizardAction>
+  onChange: (data: object) => void
+  onChangeEvent: (event: React.ChangeEvent<React.ElementRef<'input'>>) => void
+  onSubmit: () => void
+  storeData: (value: boolean) => void
+  forgetData: () => void
+}
+
+interface WizardAction {
+  type: string
+  payload?: any
+}
+
+export const WizardContext: React.Context<WizardStore> = React.createContext<
+  WizardStore
+>(null)
 
 export const ACTIONS = {
   SET_FORM_DATA: 'setFormData',
@@ -19,7 +64,7 @@ export const ACTIONS = {
   DATA_STORED_FORGOTTEN: 'dataStoredForgotten',
 }
 
-function reducer(state, action) {
+function reducer(state: WizardStoreState, action: WizardAction) {
   switch (action.type) {
     case ACTIONS.SET_FORM_DATA:
       return {
@@ -84,14 +129,7 @@ function reducer(state, action) {
   }
 }
 
-function debugReducer(state, action) {
-  console.debug('applying action', action)
-  const newState = reducer(state, action)
-  console.debug(newState)
-  return newState
-}
-
-const initialState = {
+const initialState: WizardStoreState = {
   postData: false,
   postDataError: null,
   postDataSuccess: null,
@@ -108,9 +146,11 @@ const initialState = {
     city: '',
   },
   formDataChanged: [],
+  dataStored: undefined,
+  dataStoredLoaded: undefined,
 }
 
-async function createBooking(formData) {
+async function createBooking(formData: WizardFormData) {
   const response = await fetch('/api/booking', {
     method: 'POST',
     mode: 'cors',
@@ -126,7 +166,7 @@ async function createBooking(formData) {
 }
 
 export default function WizardStore({ children }) {
-  const [state, dispatch] = useReducer(debugReducer, initialState)
+  const [state, dispatch] = useReducer(reducer, initialState)
 
   useEffect(() => {
     const data = loadBookingData()
@@ -135,7 +175,9 @@ export default function WizardStore({ children }) {
     }
   }, [])
 
-  const onChangeEvent = (event) => {
+  const onChangeEvent = (
+    event: React.ChangeEvent<React.ElementRef<'input'>>
+  ) => {
     const { name, value } = event.target
 
     dispatch({
@@ -144,7 +186,7 @@ export default function WizardStore({ children }) {
     })
   }
 
-  const onChange = (data) => {
+  const onChange = (data: object) => {
     dispatch({
       type: ACTIONS.SET_FORM_DATA,
       payload: data,
@@ -163,7 +205,7 @@ export default function WizardStore({ children }) {
     }
   }
 
-  const storeData = (value) => {
+  const storeData = (value: boolean) => {
     if (value) {
       storeBookingData(state.booking)
     }
diff --git a/components/wizard/dateSelect.tsx b/components/wizard/dateSelect.tsx
index 02e4764..6144915 100644
--- a/components/wizard/dateSelect.tsx
+++ b/components/wizard/dateSelect.tsx
@@ -1,33 +1,27 @@
-import React, { useContext, useState, useRef, useEffect } from 'react'
+import * as React from 'react'
+import { useEffect, useContext, useState, useRef } from 'react'
 import useSWR from 'swr'
 
 import { WizardContext } from './context/wizardStore'
 
-import { DateUtils } from 'react-day-picker'
+import { DateUtils, RangeModifier } from 'react-day-picker'
 import DayPickerInput from 'react-day-picker/DayPickerInput'
 
 import Required from './required'
 import { dateFormatBackend } from '../../helpers/date'
 import { getNextSmaller, getNextBigger } from '../../helpers/array'
 
-import MomentLocaleUtils, {
-  // @ts-expect-error ts-migrate(2614) FIXME: Module '"../../node_modules/react-day-picker/types... Remove this comment to see the full error message
-  formatDate,
-  // @ts-expect-error ts-migrate(2614) FIXME: Module '"../../node_modules/react-day-picker/types... Remove this comment to see the full error message
-  parseDate,
-} from 'react-day-picker/moment'
+import MomentLocaleUtils from 'react-day-picker/moment'
 import 'moment/locale/de'
 
-const fetcher = (path) => fetch(path).then((r) => r.json())
+const fetcher = (path: string) => fetch(path).then((r) => r.json())
 
 export default function DateSelect() {
-  // @ts-expect-error ts-migrate(2339) FIXME: Property 'state' does not exist on type '{}'.
-  const { state, onChange } = useContext(WizardContext)
-  const [range, setRange] = useState({
-    form: state.startDate && new Date(state.startDate),
-    to: state.endDate && new Date(state.endDate),
+  const { onChange } = useContext(WizardContext)
+  const [range, setRange] = useState<RangeModifier>({
+    from: undefined, //state.startDate && new Date(state.startDate),
+    to: undefined, //state.endDate && new Date(state.endDate),
   })
-  // @ts-expect-error ts-migrate(2339) FIXME: Property 'from' does not exist on type '{ form: Da... Remove this comment to see the full error message
   const { from, to } = range
   const { data: daysBooked, error: fetchBookedOnError } = useSWR(
     '/api/daysbooked',
@@ -39,14 +33,14 @@ export default function DateSelect() {
   )
   const nextBookedDay = getNextBigger(daysBooked, dateFormatBackend(from || to))
 
-  const fromRef = useRef()
-  const toRef = useRef()
+  const fromRef = useRef<DayPickerInput>()
+  const toRef = useRef<DayPickerInput>()
 
-  function dayBooked(day) {
+  function dayBooked(day: Date) {
     return daysBooked && daysBooked.includes(dateFormatBackend(day))
   }
 
-  function dayDisabled(day) {
+  function dayDisabled(day: Date) {
     return (
       DateUtils.isPastDay(day) ||
       dayBooked(day) ||
@@ -57,7 +51,6 @@ export default function DateSelect() {
   }
 
   useEffect(() => {
-    // @ts-expect-error ts-migrate(2532) FIXME: Object is possibly 'undefined'.
     toRef.current?.getInput().focus()
   }, [from])
 
@@ -92,8 +85,8 @@ export default function DateSelect() {
           inputProps={{ className: 'input-text' }}
           value={from}
           placeholder="Von"
-          formatDate={formatDate}
-          parseDate={parseDate}
+          formatDate={MomentLocaleUtils.formatDate}
+          parseDate={MomentLocaleUtils.parseDate}
           dayPickerProps={{
             locale: 'de',
             localeUtils: MomentLocaleUtils,
@@ -102,7 +95,6 @@ export default function DateSelect() {
             modifiers,
             numberOfMonths: 1,
           }}
-          // @ts-expect-error ts-migrate(2345) FIXME: Object literal may only specify known properties, ... Remove this comment to see the full error message
           onDayChange={(from) => setRange({ ...range, from })}
         />
         {' - '}
@@ -111,8 +103,8 @@ export default function DateSelect() {
           inputProps={{ className: 'input-text', disabled: !from }}
           value={to}
           placeholder="Bis"
-          formatDate={formatDate}
-          parseDate={parseDate}
+          formatDate={MomentLocaleUtils.formatDate}
+          parseDate={MomentLocaleUtils.parseDate}
           dayPickerProps={{
             locale: 'de',
             localeUtils: MomentLocaleUtils,
@@ -126,8 +118,10 @@ export default function DateSelect() {
           }}
           onDayChange={(to) => setRange({ ...range, to })}
         />
-        {/* @ts-expect-error ts-migrate(2345) FIXME: Type '{}' provides no match for the signature '(pr... Remove this comment to see the full error message */}
-        <button onClick={() => setRange({})} className="ibtn">
+        <button
+          onClick={() => setRange({ from: undefined, to: undefined })}
+          className="ibtn"
+        >
           <svg className="w-full" viewBox="0 0 352 512">
             <path
               fill="currentColor"
diff --git a/components/wizard/index.tsx b/components/wizard/index.tsx
index a671228..660d698 100644
--- a/components/wizard/index.tsx
+++ b/components/wizard/index.tsx
@@ -1,4 +1,5 @@
-import React, { useContext } from 'react'
+import * as React from 'react'
+import { useContext } from 'react'
 
 import Link from 'next/link'
 
@@ -9,7 +10,6 @@ import Reason from './reason'
 import Contact from './contact'
 
 function WizardInternal() {
-  // @ts-expect-error ts-migrate(2339) FIXME: Property 'onSubmit' does not exist on type '{}'.
   const { onSubmit, state, forgetData, storeData } = useContext(WizardContext)
   const {
     postData,
diff --git a/components/wizard/reason.tsx b/components/wizard/reason.tsx
index ed038ab..86b42b1 100644
--- a/components/wizard/reason.tsx
+++ b/components/wizard/reason.tsx
@@ -1,9 +1,9 @@
-import React, { useContext } from 'react'
+import * as React from 'react'
+import { useContext } from 'react'
 import { WizardContext } from './context/wizardStore'
 import Required from './required'
 
 export default function Contact() {
-  // @ts-expect-error ts-migrate(2339) FIXME: Property 'state' does not exist on type '{}'.
   const { state, onChangeEvent } = useContext(WizardContext)
 
   const { formDataChanged } = state
diff --git a/components/wizard/required.tsx b/components/wizard/required.tsx
index 6274306..f3ae905 100644
--- a/components/wizard/required.tsx
+++ b/components/wizard/required.tsx
@@ -1,4 +1,4 @@
-import React from 'react'
+import * as React from 'react'
 
 const Required = () => <span>*</span>
 export default Required
diff --git a/db/index.ts b/db/index.ts
index dd0f2f4..16b7eed 100644
--- a/db/index.ts
+++ b/db/index.ts
@@ -4,7 +4,7 @@ import Booker from './booker'
 import Booking from './booking'
 import { BOOKING_STATUS } from './bookingStatus'
 
-let connectedPromise
+let connectedPromise: Promise<typeof mongoose>
 
 function connect() {
   if (connectedPromise) {
@@ -39,13 +39,13 @@ export async function getBookedDays() {
     .sort()
 }
 
-export async function getBookingByUUID(uuid) {
+export async function getBookingByUUID(uuid: string) {
   await connect()
   const booking = await Booking.findOne({ uuid })
   return booking.populate('booker').execPopulate()
 }
 
-export async function getBookingByUUIDAsJSON(uuid) {
+export async function getBookingByUUIDAsJSON(uuid: string) {
   const booking = await getBookingByUUID(uuid)
   return booking.toJSON()
 }
@@ -66,7 +66,7 @@ export async function createBooking({
   const booking = new Booking({ startDate, endDate, purpose, org, destination })
   const bookedDays = await getBookedDays()
 
-  if (booking.days.some((day) => bookedDays.includes(day))) {
+  if (booking.days.some((day: string) => bookedDays.includes(day))) {
     throw new mongoose.Error.ValidationError(booking)
   }
 
diff --git a/helpers/array.test.ts b/helpers/array.test.ts
index c7eb884..a42b5d4 100644
--- a/helpers/array.test.ts
+++ b/helpers/array.test.ts
@@ -1,17 +1,13 @@
 import { getNextSmaller, getNextBigger } from './array'
 
-// @ts-expect-error ts-migrate(2582) FIXME: Cannot find name 'test'. Do you need to install ty... Remove this comment to see the full error message
 test('getPreviousInOrder', () => {
   const result = getNextSmaller([3, 1, 2, 0, 8, 9, 10], 5)
 
-  // @ts-expect-error ts-migrate(2304) FIXME: Cannot find name 'expect'.
   expect(result).toEqual(3)
 })
 
-// @ts-expect-error ts-migrate(2582) FIXME: Cannot find name 'test'. Do you need to install ty... Remove this comment to see the full error message
 test('getNextInOrder', () => {
   const result = getNextBigger([7, 8, 9, 3, 1, 2], 4)
 
-  // @ts-expect-error ts-migrate(2304) FIXME: Cannot find name 'expect'.
   expect(result).toEqual(7)
 })
diff --git a/helpers/array.ts b/helpers/array.ts
index d398b47..c89a615 100644
--- a/helpers/array.ts
+++ b/helpers/array.ts
@@ -1,4 +1,4 @@
-export function getNextSmaller(array, pivot) {
+export function getNextSmaller<T>(array: T[], pivot: T) {
   if (!array || !Array.isArray(array) || !array.length) {
     return null
   }
@@ -9,7 +9,7 @@ export function getNextSmaller(array, pivot) {
     .find((item) => item < pivot)
 }
 
-export function getNextBigger(array, pivot) {
+export function getNextBigger<T>(array: T[], pivot: T) {
   if (!array || !Array.isArray(array) || !array.length) {
     return null
   }
diff --git a/helpers/date.ts b/helpers/date.ts
index f0a14b5..1c56293 100644
--- a/helpers/date.ts
+++ b/helpers/date.ts
@@ -3,7 +3,13 @@ import moment from 'moment'
 const FRONTEND_FORMAT = 'DD.MM.YYYY'
 const BACKEND_FORMAT = 'YYYY-MM-DD'
 
-export function getDays({ startDate, endDate }) {
+export function getDays({
+  startDate,
+  endDate,
+}: {
+  startDate: moment.MomentInput
+  endDate: moment.MomentInput
+}) {
   let currentDay = moment(startDate)
   const days = [dateFormatBackend(currentDay)]
 
@@ -20,31 +26,30 @@ export function getDays({ startDate, endDate }) {
   return days
 }
 
-function dateFormat(date, format) {
+function dateFormat(date: moment.MomentInput, format: string) {
   if (!date) {
     return null
   }
   return moment(date).format(format)
 }
 
-export function dateFormatBackend(date) {
+export function dateFormatBackend(date: moment.MomentInput) {
   return dateFormat(date, BACKEND_FORMAT)
 }
 
-export function dateFormatFrontend(date) {
+export function dateFormatFrontend(date: moment.MomentInput) {
   return dateFormat(date, FRONTEND_FORMAT)
 }
 
-function dateParse(string, format) {
-  const date = moment(string, format)
+function dateParse(input: string, format: string) {
+  const date = moment(input, format)
   if (date.isValid()) {
-    // @ts-expect-error ts-migrate(2339) FIXME: Property 'getDate' does not exist on type 'Moment'... Remove this comment to see the full error message
-    return date.getDate()
+    return date.toDate()
   }
 
   return null
 }
 
-export function dateParseFrontend(string) {
-  return dateParse(string, FRONTEND_FORMAT)
+export function dateParseFrontend(input: string) {
+  return dateParse(input, FRONTEND_FORMAT)
 }
diff --git a/helpers/mail.ts b/helpers/mail.ts
index c34b931..9d315c8 100644
--- a/helpers/mail.ts
+++ b/helpers/mail.ts
@@ -12,7 +12,7 @@ if (!SENDGRID_API_KEY) {
   throw new Error('NO SENDGRID_API_KEY set!')
 }
 
-async function sendMail(data) {
+async function sendMail(data: object) {
   const fetchOptions = {
     method: 'POST',
     headers: {
@@ -24,13 +24,11 @@ async function sendMail(data) {
   const response = await fetch(SENDGRID_URL, fetchOptions)
 
   if (!response.ok) {
-    throw new Error(
-      `Failed to send booking ${data._id} to booking admin with status ${response.status}: ${response.statusText}`
-    )
+    throw new Error(`Unable to send mail`)
   }
 }
 
-function getReceivedBookingText(booking) {
+function getReceivedBookingText(booking: { uuid: string }) {
   return `Hallo lieber Admin,
 
   es ging folgende Buchung ein: https://${process.env.VERCEL_URL}/booking/${booking.uuid}
@@ -38,7 +36,7 @@ function getReceivedBookingText(booking) {
   MfG`
 }
 
-export async function sendReceivedBookingMail(booking) {
+export async function sendReceivedBookingMail(booking: { uuid: string }) {
   const data = {
     personalizations: [
       {
@@ -46,9 +44,13 @@ export async function sendReceivedBookingMail(booking) {
       },
     ],
     from: { email: FROM_EMAIL },
-    subject: 'Pfadi Bussle - Buchung eingegangen!',
+    subject: `Pfadi Bussle - Buchung ${booking.uuid} eingegangen!`,
     content: [{ type: 'text/plain', value: getReceivedBookingText(booking) }],
   }
 
-  await sendMail(data)
+  try {
+    await sendMail(data)
+  } catch (error) {
+    console.error(`Failed in sendReceivedBookingMail for ${booking.uuid}`)
+  }
 }
diff --git a/package-lock.json b/package-lock.json
index 1a03c40..bb1b660 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2129,6 +2129,14 @@
         "@babel/types": "^7.3.0"
       }
     },
+    "@types/bson": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/@types/bson/-/bson-4.0.2.tgz",
+      "integrity": "sha512-+uWmsejEHfmSjyyM/LkrP0orfE2m5Mx9Xel4tXNeqi1ldK5XMQcDsFkBmLDtuyKUbxj2jGDo0H240fbCRJZo7Q==",
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "@types/color-name": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/@types/color-name/-/color-name-1.1.1.tgz",
@@ -2167,11 +2175,148 @@
         "@types/istanbul-lib-report": "*"
       }
     },
+    "@types/jest": {
+      "version": "26.0.10",
+      "resolved": "https://registry.npmjs.org/@types/jest/-/jest-26.0.10.tgz",
+      "integrity": "sha512-i2m0oyh8w/Lum7wWK/YOZJakYF8Mx08UaKA1CtbmFeDquVhAEdA7znacsVSf2hJ1OQ/OfVMGN90pw/AtzF8s/Q==",
+      "dev": true,
+      "requires": {
+        "jest-diff": "^25.2.1",
+        "pretty-format": "^25.2.1"
+      },
+      "dependencies": {
+        "@jest/types": {
+          "version": "25.5.0",
+          "resolved": "https://registry.npmjs.org/@jest/types/-/types-25.5.0.tgz",
+          "integrity": "sha512-OXD0RgQ86Tu3MazKo8bnrkDRaDXXMGUqd+kTtLtK1Zb7CRzQcaSRPPPV37SvYTdevXEBVxe0HXylEjs8ibkmCw==",
+          "dev": true,
+          "requires": {
+            "@types/istanbul-lib-coverage": "^2.0.0",
+            "@types/istanbul-reports": "^1.1.1",
+            "@types/yargs": "^15.0.0",
+            "chalk": "^3.0.0"
+          }
+        },
+        "@types/istanbul-reports": {
+          "version": "1.1.2",
+          "resolved": "https://registry.npmjs.org/@types/istanbul-reports/-/istanbul-reports-1.1.2.tgz",
+          "integrity": "sha512-P/W9yOX/3oPZSpaYOCQzGqgCQRXn0FFO/V8bWrCQs+wLmvVVxk6CRBXALEvNs9OHIatlnlFokfhuDo2ug01ciw==",
+          "dev": true,
+          "requires": {
+            "@types/istanbul-lib-coverage": "*",
+            "@types/istanbul-lib-report": "*"
+          }
+        },
+        "ansi-styles": {
+          "version": "4.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.2.1.tgz",
+          "integrity": "sha512-9VGjrMsG1vePxcSweQsN20KY/c4zN0h9fLjqAbwbPfahM3t+NL+M9HC8xeXG2I8pX5NoamTGNuomEUFI7fcUjA==",
+          "dev": true,
+          "requires": {
+            "@types/color-name": "^1.1.1",
+            "color-convert": "^2.0.1"
+          }
+        },
+        "chalk": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-3.0.0.tgz",
+          "integrity": "sha512-4D3B6Wf41KOYRFdszmDqMCGq5VV/uMAB273JILmO+3jAlh8X4qDtdtgCR3fxtbLEMzSx22QdhnDcJvu2u1fVwg==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^4.1.0",
+            "supports-color": "^7.1.0"
+          }
+        },
+        "color-convert": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
+          "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
+          "dev": true,
+          "requires": {
+            "color-name": "~1.1.4"
+          }
+        },
+        "color-name": {
+          "version": "1.1.4",
+          "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
+          "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
+          "dev": true
+        },
+        "diff-sequences": {
+          "version": "25.2.6",
+          "resolved": "https://registry.npmjs.org/diff-sequences/-/diff-sequences-25.2.6.tgz",
+          "integrity": "sha512-Hq8o7+6GaZeoFjtpgvRBUknSXNeJiCx7V9Fr94ZMljNiCr9n9L8H8aJqgWOQiDDGdyn29fRNcDdRVJ5fdyihfg==",
+          "dev": true
+        },
+        "has-flag": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
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+          "dev": true
+        },
+        "jest-diff": {
+          "version": "25.5.0",
+          "resolved": "https://registry.npmjs.org/jest-diff/-/jest-diff-25.5.0.tgz",
+          "integrity": "sha512-z1kygetuPiREYdNIumRpAHY6RXiGmp70YHptjdaxTWGmA085W3iCnXNx0DhflK3vwrKmrRWyY1wUpkPMVxMK7A==",
+          "dev": true,
+          "requires": {
+            "chalk": "^3.0.0",
+            "diff-sequences": "^25.2.6",
+            "jest-get-type": "^25.2.6",
+            "pretty-format": "^25.5.0"
+          }
+        },
+        "jest-get-type": {
+          "version": "25.2.6",
+          "resolved": "https://registry.npmjs.org/jest-get-type/-/jest-get-type-25.2.6.tgz",
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+          "dev": true
+        },
+        "pretty-format": {
+          "version": "25.5.0",
+          "resolved": "https://registry.npmjs.org/pretty-format/-/pretty-format-25.5.0.tgz",
+          "integrity": "sha512-kbo/kq2LQ/A/is0PQwsEHM7Ca6//bGPPvU6UnsdDRSKTWxT/ru/xb88v4BJf6a69H+uTytOEsTusT9ksd/1iWQ==",
+          "dev": true,
+          "requires": {
+            "@jest/types": "^25.5.0",
+            "ansi-regex": "^5.0.0",
+            "ansi-styles": "^4.0.0",
+            "react-is": "^16.12.0"
+          }
+        },
+        "supports-color": {
+          "version": "7.1.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.1.0.tgz",
+          "integrity": "sha512-oRSIpR8pxT1Wr2FquTNnGet79b3BWljqOuoW/h4oBhxJ/HUbX5nX6JSruTkvXDCFMwDPvsaTTbvMLKZWSy0R5g==",
+          "dev": true,
+          "requires": {
+            "has-flag": "^4.0.0"
+          }
+        }
+      }
+    },
+    "@types/mongodb": {
+      "version": "3.5.26",
+      "resolved": "https://registry.npmjs.org/@types/mongodb/-/mongodb-3.5.26.tgz",
+      "integrity": "sha512-p0X2VJgIBNHfNBdZdzzG8eQ/3bf6mQoXDT0UhVyVEdSzXEa1+2pFcwGvEZp72sjztyBwfRKlgrXMjCVavLcuGg==",
+      "requires": {
+        "@types/bson": "*",
+        "@types/node": "*"
+      }
+    },
+    "@types/mongoose": {
+      "version": "5.7.36",
+      "resolved": "https://registry.npmjs.org/@types/mongoose/-/mongoose-5.7.36.tgz",
+      "integrity": "sha512-ggFXgvkHgCNlT35B9d/heDYfSqOSwTmQjkRoR32sObGV5Xjd0N0WWuYlLzqeCg94j4hYN/OZxZ1VNNLltX/IVQ==",
+      "requires": {
+        "@types/mongodb": "*",
+        "@types/node": "*"
+      }
+    },
     "@types/node": {
       "version": "14.0.27",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-14.0.27.tgz",
-      "integrity": "sha512-kVrqXhbclHNHGu9ztnAwSncIgJv/FaxmzXJvGXNdcCpV1b8u1/Mi6z6m0vwy0LzKeXFTPLH0NzwmoJ3fNCIq0g==",
-      "dev": true
+      "integrity": "sha512-kVrqXhbclHNHGu9ztnAwSncIgJv/FaxmzXJvGXNdcCpV1b8u1/Mi6z6m0vwy0LzKeXFTPLH0NzwmoJ3fNCIq0g=="
     },
     "@types/normalize-package-data": {
       "version": "2.4.0",
@@ -2220,6 +2365,11 @@
       "integrity": "sha512-l42BggppR6zLmpfU6fq9HEa2oGPEI8yrSPL3GITjfRInppYFahObbIQOQK3UGxEnyQpltZLaPe75046NOZQikw==",
       "dev": true
     },
+    "@types/uuid": {
+      "version": "8.3.0",
+      "resolved": "https://registry.npmjs.org/@types/uuid/-/uuid-8.3.0.tgz",
+      "integrity": "sha512-eQ9qFW/fhfGJF8WKHGEHZEyVWfZxrT+6CLIJGBcZPfxUh/+BnEj+UCGYMlr9qZuX/2AltsvwrGqp0LhEW8D0zQ=="
+    },
     "@types/yargs": {
       "version": "15.0.5",
       "resolved": "https://registry.npmjs.org/@types/yargs/-/yargs-15.0.5.tgz",
diff --git a/package.json b/package.json
index 7612094..74951cf 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,8 @@
     "test:ci": "jest"
   },
   "dependencies": {
+    "@types/mongoose": "^5.7.36",
+    "@types/uuid": "^8.3.0",
     "moment": "^2.27.0",
     "mongoose": "^5.9.25",
     "next": "^9.5.2",
@@ -21,6 +23,7 @@
     "uuid": "^8.3.0"
   },
   "devDependencies": {
+    "@types/jest": "^26.0.10",
     "@types/react": "^16.9.48",
     "babel-jest": "^26.3.0",
     "eslint": "^7.6.0",
diff --git a/tsconfig.json b/tsconfig.json
index 1a1a5b7..4fe19b4 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,29 +1,20 @@
 {
   "compilerOptions": {
     "target": "es5",
-    "lib": [
-      "dom",
-      "dom.iterable",
-      "esnext"
-    ],
+    "lib": ["dom", "dom.iterable", "esnext"],
     "allowJs": true,
     "skipLibCheck": true,
     "strict": false,
     "forceConsistentCasingInFileNames": false,
     "noEmit": true,
     "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true,
     "module": "esnext",
     "moduleResolution": "node",
     "resolveJsonModule": true,
     "isolatedModules": true,
     "jsx": "preserve"
   },
-  "include": [
-    "next-env.d.ts",
-    "**/*.ts",
-    "**/*.tsx"
-  ],
-  "exclude": [
-    "node_modules"
-  ]
+  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx"],
+  "exclude": ["node_modules"]
 }