diff --git a/app.js b/app.ts
similarity index 77%
rename from app.js
rename to app.ts
index c88c10d..8ab053e 100644
--- a/app.js
+++ b/app.ts
@@ -1,7 +1,8 @@
-const express = require('express')
-const helmet = require('helmet')
-const cors = require('cors')
-const morgan = require('morgan')
+import express from 'express'
+import helmet from 'helmet'
+import cors from 'cors'
+import morgan from 'morgan'
+import api from './src/api'
 
 const app = express()
 
@@ -44,8 +45,8 @@ app.use(
 
 app.use(express.json())
 
-const api = require('./src/api')
-
 app.use(api)
 
+export default app
+// support CommonJS default import
 module.exports = app
diff --git a/index.js b/index.ts
similarity index 88%
rename from index.js
rename to index.ts
index 2eba0c2..40a83fd 100644
--- a/index.js
+++ b/index.ts
@@ -1,6 +1,6 @@
 /* eslint-disable no-console */
-const http = require('http')
-const app = require('./app')
+import http from 'http'
+import app from './app'
 
 /**
  * Create HTTP server.
@@ -10,7 +10,7 @@ const server = http.createServer(app)
 /**
  * Normalize a port into a number, string, or false.
  */
-const normalizePort = (val) => {
+const normalizePort = (val: string): number | string | false => {
   const numericPort = parseInt(val, 10)
 
   // eslint-disable-next-line no-restricted-globals
@@ -36,7 +36,7 @@ app.set('port', port)
 /**
  * Event listener for HTTP server "error" event.
  */
-const onError = (error) => {
+const onError = (error: NodeJS.ErrnoException) => {
   if (error.syscall !== 'listen') {
     throw error
   }
@@ -63,7 +63,7 @@ const onError = (error) => {
  */
 const onListening = () => {
   const addr = server.address()
-  const bind = typeof addr === 'string' ? `pipe ${addr}` : `port ${addr.port}`
+  const bind = typeof addr === 'string' ? `pipe ${addr}` : `port ${(addr as any).port}`
   console.log(`Listening on ${bind}`)
 }
 
diff --git a/package.json b/package.json
index cb503eb..6141c0b 100644
--- a/package.json
+++ b/package.json
@@ -2,21 +2,24 @@
   "name": "astrology_api",
   "version": "1.3.0",
   "description": "Api para el calculos astrologicos",
-  "main": "index.js",
+  "main": "dist/index.js",
   "engines": {
     "node": ">=14.x"
   },
   "scripts": {
-    "start": "node index.js",
-    "dev": "nodemon --watch src src/index.js",
+    "build": "tsc",
+    "start": "node dist/index.js",
+    "dev": "ts-node index.ts",
     "test": "ENVIRONMENT=test jest",
     "coverage": "ENVIRONMENT=test jest --coverage",
     "coveralls": "ENVIRONMENT=test jest --coverage && cat ./coverage/lcov.info | coveralls",
     "lint": "./node_modules/.bin/eslint --fix src"
   },
   "jest": {
+    "preset": "ts-jest",
+    "testEnvironment": "node",
     "coveragePathIgnorePatterns": [
-      "./app.js"
+      "./app.ts"
     ]
   },
   "keywords": [
@@ -26,6 +29,7 @@
   "devDependencies": {
     "@types/express": "^4.17.6",
     "@types/jest": "^25.2.1",
+    "@types/node": "^18.0.0",
     "coveralls": "^3.0.9",
     "eslint": "^8.15.0",
     "eslint-config-standard": "^17.0.0",
@@ -34,7 +38,10 @@
     "eslint-plugin-promise": "^6.0.0",
     "jest": "^28.1.0",
     "nodemon": "^2.0.4",
-    "supertest": "^4.0.2"
+    "supertest": "^4.0.2",
+    "ts-jest": "^28.0.0",
+    "ts-node": "^10.9.1",
+    "typescript": "^5.0.0"
   },
   "dependencies": {
     "cors": "^2.8.5",
diff --git a/src/api/index.js b/src/api/index.js
deleted file mode 100644
index 6cf8ee7..0000000
--- a/src/api/index.js
+++ /dev/null
@@ -1,19 +0,0 @@
-const Router = require('express-promise-router')
-const astrologer = require('../astrologer')
-
-const router = new Router()
-
-router.get('/', async (req, res) => res.status(200).json({ message: 'Welcome to Astrology api!' }))
-
-router.get('/horoscope', async (req, res) => {
-  const date = new Date(req.query.time)
-  const { latitude, longitude, houseSystem } = req.query
-
-  const chart = astrologer.natalChart(date, latitude, longitude, houseSystem)
-
-  res.status(200).json({
-    data: chart
-  })
-})
-
-module.exports = router
diff --git a/src/api/index.ts b/src/api/index.ts
new file mode 100644
index 0000000..e937fef
--- /dev/null
+++ b/src/api/index.ts
@@ -0,0 +1,19 @@
+import Router from 'express-promise-router'
+import astrologer from '../astrologer'
+
+const router = new Router()
+
+router.get('/', async (_req, res) => res.status(200).json({ message: 'Welcome to Astrology api!' }))
+
+router.get('/horoscope', async (req, res) => {
+  const date = new Date(req.query.time as string)
+  const { latitude, longitude, houseSystem } = req.query as Record<string, string>
+
+  const chart = astrologer.natalChart(date, latitude, longitude, houseSystem)
+
+  res.status(200).json({
+    data: chart
+  })
+})
+
+export default router
diff --git a/src/astrologer/aspects.js b/src/astrologer/aspects.js
deleted file mode 100644
index 57a3682..0000000
--- a/src/astrologer/aspects.js
+++ /dev/null
@@ -1,126 +0,0 @@
-const { normalizeDegrees } = require('./utils')
-
-const ASPECTS = {
-  0: 'conjunction',
-  30: 'semisextile',
-  60: 'sextile',
-  90: 'quadrature',
-  120: 'trigone',
-  150: 'quincunx',
-  180: 'opposition'
-}
-
-// HUBER ORBS... but mars and jupiter modified...
-const DEFAULT_ORBS = {
-  luminary: {
-    0: 10,
-    30: 3,
-    60: 5,
-    90: 6,
-    120: 8,
-    150: 5,
-    180: 10
-  },
-  personal: {
-    0: 7,
-    30: 2,
-    60: 4,
-    90: 5,
-    120: 6,
-    150: 2,
-    180: 7
-  },
-  social: {
-    0: 6,
-    30: 1.5,
-    60: 3,
-    90: 4,
-    120: 5,
-    150: 3,
-    180: 6
-  },
-  transpersonal: {
-    0: 5,
-    30: 1,
-    60: 2,
-    90: 3,
-    120: 4,
-    150: 2,
-    180: 5
-  },
-  other: {
-    0: 5,
-    30: 1,
-    60: 2,
-    90: 3,
-    120: 4,
-    150: 2,
-    180: 5
-  }
-}
-
-const calculateAspect = (first, second, orbs) => {
-  return Object.keys({ ...ASPECTS }).filter(
-    (a) => {
-      const totalOrbsForAspect = orbs[a]
-      const from = parseFloat(a) - (totalOrbsForAspect / 2)
-      const to = parseFloat(a) + (totalOrbsForAspect / 2)
-
-      const firstLongitude = normalizeDegrees(first.position.longitude)
-      const secondLongitude = normalizeDegrees(second.position.longitude)
-
-      const diff = Math.abs(firstLongitude - secondLongitude)
-      return diff >= from && diff <= to
-    }
-  )
-}
-
-const aspect = (first, second, orbs) => {
-  if (orbs === undefined) {
-    orbs = { ...DEFAULT_ORBS }
-  }
-
-  const aspectsFirst = calculateAspect(first, second, orbs[first.type])
-  const aspectsSecond = calculateAspect(first, second, orbs[second.type])
-
-  if (aspectsFirst.length === 0 && aspectsSecond.length === 0) {
-    return undefined
-  }
-
-  const direction = aspectsFirst.length === 1 && aspectsSecond.length === 1 ? 'bidirectional' : 'unidirectional'
-
-  return {
-    name: ASPECTS[aspectsFirst[0]],
-    direction,
-    first: {
-      name: first.name,
-      exist: aspectsFirst.length === 1
-    },
-    second: {
-      name: second.name,
-      exist: aspectsSecond.length === 1
-    }
-  }
-}
-
-const aspects = (planets) => {
-  return Object.keys(planets).reduce((acc, planetKey) => {
-    acc[planetKey] = []
-
-    Object.values(planets).filter((p) => p.name !== planetKey).forEach((p) => {
-      if (!acc[p.name]) {
-        const aspectsFounds = aspect(planets[planetKey], p)
-        if (aspectsFounds) {
-          acc[planetKey].push(aspectsFounds)
-        }
-      }
-    })
-
-    return acc
-  }, {})
-}
-
-module.exports = {
-  aspect,
-  aspects
-}
diff --git a/src/astrologer/aspects.ts b/src/astrologer/aspects.ts
new file mode 100644
index 0000000..1e468b7
--- /dev/null
+++ b/src/astrologer/aspects.ts
@@ -0,0 +1,167 @@
+import { normalizeDegrees } from './utils'
+
+// Supported angular distances between planets and their corresponding names
+const ASPECTS: Record<AspectAngle, string> = {
+  0: 'conjunction',
+  30: 'semisextile',
+  60: 'sextile',
+  90: 'quadrature',
+  120: 'trigone',
+  150: 'quincunx',
+  180: 'opposition'
+}
+
+// Classification of planets used by the aspect calculator
+export type PlanetType =
+  | 'luminary'
+  | 'personal'
+  | 'social'
+  | 'transpersonal'
+  | 'other'
+
+export interface Position {
+  longitude: number
+}
+
+export interface Planet {
+  name: string
+  type: PlanetType
+  position: Position
+}
+
+export type AspectAngle = 0 | 30 | 60 | 90 | 120 | 150 | 180
+
+// Default orb values for each planet type and aspect angle
+export type Orbs = Record<PlanetType, Record<AspectAngle, number>>
+
+const DEFAULT_ORBS: Orbs = {
+  luminary: {
+    0: 10,
+    30: 3,
+    60: 5,
+    90: 6,
+    120: 8,
+    150: 5,
+    180: 10
+  },
+  personal: {
+    0: 7,
+    30: 2,
+    60: 4,
+    90: 5,
+    120: 6,
+    150: 2,
+    180: 7
+  },
+  social: {
+    0: 6,
+    30: 1.5,
+    60: 3,
+    90: 4,
+    120: 5,
+    150: 3,
+    180: 6
+  },
+  transpersonal: {
+    0: 5,
+    30: 1,
+    60: 2,
+    90: 3,
+    120: 4,
+    150: 2,
+    180: 5
+  },
+  other: {
+    0: 5,
+    30: 1,
+    60: 2,
+    90: 3,
+    120: 4,
+    150: 2,
+    180: 5
+  }
+}
+
+const calculateAspect = (
+  first: Planet,
+  second: Planet,
+  orbs: Record<AspectAngle, number>
+): AspectAngle[] => {
+  const firstLongitude = normalizeDegrees(first.position.longitude)
+  const secondLongitude = normalizeDegrees(second.position.longitude)
+  const diff = Math.abs(firstLongitude - secondLongitude)
+
+  return (Object.keys(ASPECTS) as unknown as AspectAngle[]).filter((angle) => {
+    const totalOrbsForAspect = orbs[angle]
+    const from = angle - totalOrbsForAspect / 2
+    const to = angle + totalOrbsForAspect / 2
+    return diff >= from && diff <= to
+  })
+}
+
+export type Direction = 'bidirectional' | 'unidirectional'
+
+export interface AspectResult {
+  name: string
+  direction: Direction
+  first: { name: string; exist: boolean }
+  second: { name: string; exist: boolean }
+}
+
+const aspect = (
+  first: Planet,
+  second: Planet,
+  orbs: Orbs = DEFAULT_ORBS
+): AspectResult | undefined => {
+  const aspectsFirst = calculateAspect(first, second, orbs[first.type])
+  const aspectsSecond = calculateAspect(first, second, orbs[second.type])
+
+  if (aspectsFirst.length === 0 && aspectsSecond.length === 0) {
+    return undefined
+  }
+
+  const angle = aspectsFirst[0] ?? aspectsSecond[0]
+  const direction: Direction =
+    aspectsFirst.length === 1 && aspectsSecond.length === 1
+      ? 'bidirectional'
+      : 'unidirectional'
+
+  return {
+    name: ASPECTS[angle],
+    direction,
+    first: {
+      name: first.name,
+      exist: aspectsFirst.length === 1
+    },
+    second: {
+      name: second.name,
+      exist: aspectsSecond.length === 1
+    }
+  }
+}
+
+export interface AspectsMap {
+  [planet: string]: AspectResult[]
+}
+
+const aspects = (planets: Record<string, Planet>, orbs: Orbs = DEFAULT_ORBS): AspectsMap => {
+  return Object.keys(planets).reduce<AspectsMap>((acc, planetKey) => {
+    acc[planetKey] = []
+
+    Object.values(planets)
+      .filter((p) => p.name !== planetKey)
+      .forEach((p) => {
+        if (!acc[p.name]) {
+          const aspectsFound = aspect(planets[planetKey], p, orbs)
+          if (aspectsFound) {
+            acc[planetKey].push(aspectsFound)
+          }
+        }
+      })
+
+    return acc
+  }, {})
+}
+
+export { aspect, aspects }
+
diff --git a/src/astrologer/astros.js b/src/astrologer/astros.ts
similarity index 66%
rename from src/astrologer/astros.js
rename to src/astrologer/astros.ts
index 69a3106..6421127 100644
--- a/src/astrologer/astros.js
+++ b/src/astrologer/astros.ts
@@ -1,6 +1,6 @@
-const sweph = require('sweph')
-const { utcToJulianEt, zodiacSign, degreesToDms } = require('./utils')
-const path = require('path')
+import sweph from 'sweph'
+import { utcToJulianEt, zodiacSign, degreesToDms } from './utils'
+import path from 'path'
 
 sweph.set_ephe_path(path.join(__dirname, '/../../eph'))
 
@@ -65,13 +65,13 @@ const planetsByType = {
 
 const FLAG = SEFLG_SPEED | SEFLG_SWIEPH
 
-const getPositionOfAstro = (astro, julianDay) => sweph.calc(julianDay, PLANETS[astro], FLAG)
+const getPositionOfAstro = (astro: string, julianDay: number) => sweph.calc(julianDay, PLANETS[astro], FLAG)
 
-const isRetrograde = (speed) => speed < 0
+const isRetrograde = (speed: number) => speed < 0
 
-const position = (astrologyObject, moment) => {
+const position = (astrologyObject: string, moment: Date) => {
   const julianDay = utcToJulianEt(moment)
-  const { data } = getPositionOfAstro(astrologyObject, julianDay)
+  const { data } = getPositionOfAstro(astrologyObject, julianDay) as any
   const longitude = data[0]
   const speed = data[3]
   const dms = degreesToDms(longitude)
@@ -88,25 +88,16 @@ const position = (astrologyObject, moment) => {
   }
 }
 
-const planets = (date) => {
-  return Object.keys(PLANETS)
-    .reduce(
-      (accumulator, name) => {
-        const planetPosition = position(name, date)
-        accumulator[name] = {
-          name,
-          ...planetPosition,
-          type: planetsByType[name]
-        }
-        return accumulator
-      },
-      {}
-    )
+const planets = (date: Date) => {
+  return Object.keys(PLANETS).reduce((accumulator: any, name) => {
+    const planetPosition = position(name, date)
+    accumulator[name] = {
+      name,
+      ...planetPosition,
+      type: (planetsByType as any)[name]
+    }
+    return accumulator
+  }, {})
 }
 
-module.exports = {
-  PLANETS,
-  position,
-  planetsByType,
-  planets
-}
+export { PLANETS, position, planetsByType, planets }
diff --git a/src/astrologer/charts.js b/src/astrologer/charts.ts
similarity index 60%
rename from src/astrologer/charts.js
rename to src/astrologer/charts.ts
index a442fef..52ffc2f 100644
--- a/src/astrologer/charts.js
+++ b/src/astrologer/charts.ts
@@ -1,8 +1,13 @@
-const { houses } = require('./houses')
-const { aspects } = require('./aspects')
-const { planets } = require('./astros')
+import { houses } from './houses'
+import { aspects } from './aspects'
+import { planets } from './astros'
 
-const natalChart = (date, latitude, longitude, houseSystem = 'P') => {
+const natalChart = (
+  date: Date,
+  latitude: string,
+  longitude: string,
+  houseSystem = 'P'
+) => {
   const astrosList = planets(date)
   const aspectsList = aspects(astrosList)
   const housesList = houses(
@@ -23,6 +28,4 @@ const natalChart = (date, latitude, longitude, houseSystem = 'P') => {
   }
 }
 
-module.exports = {
-  natalChart
-}
+export { natalChart }
diff --git a/src/astrologer/houses.js b/src/astrologer/houses.ts
similarity index 56%
rename from src/astrologer/houses.js
rename to src/astrologer/houses.ts
index dbb37be..fb443d4 100644
--- a/src/astrologer/houses.js
+++ b/src/astrologer/houses.ts
@@ -1,11 +1,10 @@
-const sweph = require('sweph')
-const path = require('path')
+import sweph from 'sweph'
+import path from 'path'
+import { utcToJulianUt, degreesToDms, zodiacSign } from './utils'
 
 sweph.set_ephe_path(path.join(__dirname, '/../../eph'))
 
-const { utcToJulianUt, degreesToDms, zodiacSign } = require('./utils')
-
-const houses = (date, position, houseSystem = 'P') => {
+const houses = (date: Date, position: any, houseSystem = 'P') => {
   const julianDayUT = utcToJulianUt(date)
 
   const withoutGeoposition = !(position?.latitude && position?.longitude)
@@ -27,12 +26,15 @@ const houses = (date, position, houseSystem = 'P') => {
     position.latitude,
     position.longitude,
     houseSystem // placidus system...
-  ).data
+  ).data as any
 
-  const houseCollection = housesPositions.map((cuspid) => ({ position: degreesToDms(cuspid), sign: zodiacSign(cuspid) }))
+  const houseCollection = housesPositions.map((cuspid: number) => ({ position: degreesToDms(cuspid), sign: zodiacSign(cuspid) }))
 
   const axes = {
-    asc: houseCollection[0], dc: houseCollection[6], mc: houseCollection[9], ic: houseCollection[3]
+    asc: houseCollection[0],
+    dc: houseCollection[6],
+    mc: houseCollection[9],
+    ic: houseCollection[3]
   }
 
   return {
@@ -41,6 +43,4 @@ const houses = (date, position, houseSystem = 'P') => {
   }
 }
 
-module.exports = {
-  houses
-}
+export { houses }
diff --git a/src/astrologer/index.js b/src/astrologer/index.js
deleted file mode 100644
index 76f6037..0000000
--- a/src/astrologer/index.js
+++ /dev/null
@@ -1,14 +0,0 @@
-const { PLANETS, position, planets } = require('./astros')
-const { houses } = require('./houses')
-const { aspect, aspects } = require('./aspects')
-const charts = require('./charts')
-
-module.exports = {
-  houses,
-  position,
-  PLANETS,
-  planets,
-  aspect,
-  aspects,
-  ...charts
-}
diff --git a/src/astrologer/index.ts b/src/astrologer/index.ts
new file mode 100644
index 0000000..fa64225
--- /dev/null
+++ b/src/astrologer/index.ts
@@ -0,0 +1,14 @@
+import { PLANETS, position, planets } from './astros'
+import { houses } from './houses'
+import { aspect, aspects } from './aspects'
+import * as charts from './charts'
+
+export {
+  houses,
+  position,
+  PLANETS,
+  planets,
+  aspect,
+  aspects,
+  ...charts
+}
diff --git a/src/astrologer/utils.js b/src/astrologer/utils.ts
similarity index 61%
rename from src/astrologer/utils.js
rename to src/astrologer/utils.ts
index 4fef73b..fa6a553 100644
--- a/src/astrologer/utils.js
+++ b/src/astrologer/utils.ts
@@ -1,9 +1,9 @@
-const sweph = require('sweph')
-const path = require('path')
+import sweph from 'sweph'
+import path from 'path'
 
 sweph.set_ephe_path(path.join(__dirname, '/../../eph'))
 
-const utcToJulianUt = (utcDate) => {
+const utcToJulianUt = (utcDate: Date) => {
   const milliSecondsInSeconds = utcDate.getUTCMilliseconds() / 1000
   const secondsInMinutes = (utcDate.getUTCSeconds() + milliSecondsInSeconds) / 60
   const minutesInHours = (utcDate.getUTCMinutes() + secondsInMinutes) / 60
@@ -19,14 +19,14 @@ const utcToJulianUt = (utcDate) => {
   )
 }
 
-const utcToJulianEt = (utcDate) => {
+const utcToJulianEt = (utcDate: Date) => {
   const julianUt = utcToJulianUt(utcDate)
-  const delta = sweph.deltat(julianUt)
+  const delta = (sweph as any).deltat(julianUt)
   return julianUt + delta
 }
 
-const degreesToDms = (value) => {
-  const position = sweph.split_deg(value, sweph.constants.SE_SPLIT_DEG_ZODIACAL)
+const degreesToDms = (value: number) => {
+  const position = sweph.split_deg(value, (sweph as any).constants.SE_SPLIT_DEG_ZODIACAL)
   const { degree: degrees, minute: minutes, second: seconds } = position
   return {
     degrees,
@@ -36,9 +36,9 @@ const degreesToDms = (value) => {
   }
 }
 
-const zodiacSign = (degrees) => (Math.floor(degrees / 30) % 12) + 1
+const zodiacSign = (degrees: number) => (Math.floor(degrees / 30) % 12) + 1
 
-const normalizeDegrees = (degrees) => {
+const normalizeDegrees = (degrees: number) => {
   if (degrees < -180) {
     return degrees + 360
   }
@@ -49,10 +49,4 @@ const normalizeDegrees = (degrees) => {
   return degrees
 }
 
-module.exports = {
-  utcToJulianUt,
-  degreesToDms,
-  zodiacSign,
-  normalizeDegrees,
-  utcToJulianEt
-}
+export { utcToJulianUt, degreesToDms, zodiacSign, normalizeDegrees, utcToJulianEt }
diff --git a/test/features/empty-houses-and-axes-when-not-send-geoposition.test.js b/test/features/empty-houses-and-axes-when-not-send-geoposition.test.js
index f022af8..eb2eacf 100644
--- a/test/features/empty-houses-and-axes-when-not-send-geoposition.test.js
+++ b/test/features/empty-houses-and-axes-when-not-send-geoposition.test.js
@@ -1,5 +1,5 @@
 const request = require('supertest')
-const app = require('./../../app')
+const app = require('./../../app').default
 
 describe('Get houses empty and axes as undefined when geolocation is not send', () => {
   let response
diff --git a/test/features/get-houses-cuspids-in-placidus-system.spec.js b/test/features/get-houses-cuspids-in-placidus-system.spec.js
index e033a6f..3249e73 100644
--- a/test/features/get-houses-cuspids-in-placidus-system.spec.js
+++ b/test/features/get-houses-cuspids-in-placidus-system.spec.js
@@ -1,5 +1,5 @@
 const request = require('supertest')
-const app = require('./../../app')
+const app = require('./../../app').default
 
 describe('Get placidus houses system cuspids for 1991-07-06T16:50:00-04:00', () => {
   let response
diff --git a/test/features/get-planets-positions-for-06-07-1991-205000gmt.spec.js b/test/features/get-planets-positions-for-06-07-1991-205000gmt.spec.js
index 3d49eea..075dad1 100644
--- a/test/features/get-planets-positions-for-06-07-1991-205000gmt.spec.js
+++ b/test/features/get-planets-positions-for-06-07-1991-205000gmt.spec.js
@@ -1,5 +1,5 @@
 const request = require('supertest')
-const app = require('./../../app')
+const app = require('./../../app').default
 
 describe('Get the planets position for 1991-07-06T16:50:00-04:00', () => {
   let response
diff --git a/test/features/support-additionals-house-systems.spec.js b/test/features/support-additionals-house-systems.spec.js
index 1e970d1..71e64b1 100644
--- a/test/features/support-additionals-house-systems.spec.js
+++ b/test/features/support-additionals-house-systems.spec.js
@@ -1,5 +1,5 @@
 const request = require('supertest')
-const app = require('./../../app')
+const app = require('./../../app').default
 
 describe('Get Koch houses system cuspids for 1991-07-06T16:50:00-04:00', () => {
   let response
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000..973efec
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "module": "commonjs",
+    "esModuleInterop": true,
+    "strict": true,
+    "outDir": "dist",
+    "rootDir": ".",
+    "moduleResolution": "node",
+    "resolveJsonModule": true,
+    "skipLibCheck": true
+  },
+  "include": ["src/**/*", "index.ts", "app.ts", "types/**/*.d.ts"],
+  "exclude": ["node_modules", "dist", "test"]
+}
diff --git a/types/sweph.d.ts b/types/sweph.d.ts
new file mode 100644
index 0000000..31b1984
--- /dev/null
+++ b/types/sweph.d.ts
@@ -0,0 +1 @@
+declare module 'sweph';