diff --git a/.gitignore b/.gitignore
index 3fb180fe..16a6957a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,6 @@ logs.json
 server/public/main.min.*
 coverage
 .vscode
+index.js
+*.d.ts
+*.tsbuildinfo
diff --git a/.npmignore b/.npmignore
new file mode 100644
index 00000000..2a990f61
--- /dev/null
+++ b/.npmignore
@@ -0,0 +1,3 @@
+index.ts
+tsconfig.json
+tsconfig.tsbuildinfo
diff --git a/index.js b/index.ts
similarity index 54%
rename from index.js
rename to index.ts
index 496c5602..64bf7046 100644
--- a/index.js
+++ b/index.ts
@@ -1,21 +1,40 @@
-const validator = require('validator')
-const EventSource = require('eventsource')
-const superagent = require('superagent')
-const url = require('url')
-const querystring = require('querystring')
+import validator = require('validator')
+import EventSource = require('eventsource')
+import superagent = require('superagent')
+import url = require('url')
+import querystring = require('querystring')
+
+type Severity = 'info' | 'error'
+
+interface Options {
+  source: string
+  target: string
+  logger?: Pick<Console, Severity>
+}
 
 class Client {
-  constructor ({ source, target, logger = console }) {
+  source: string;
+  target: string;
+  logger: Pick<Console, Severity>;
+  events!: EventSource;
+
+  constructor ({ source, target, logger = console }: Options) {
     this.source = source
     this.target = target
-    this.logger = logger
+    this.logger = logger!
 
     if (!validator.isURL(this.source)) {
       throw new Error('The provided URL is invalid.')
     }
   }
 
-  onmessage (msg) {
+  static async createChannel () {
+    return superagent.head('https://smee.io/new').redirects(0).catch((err) => {
+      return err.response.headers.location
+    })
+  }
+
+  onmessage (msg: any) {
     const data = JSON.parse(msg.data)
 
     const target = url.parse(this.target, true)
@@ -24,7 +43,7 @@ class Client {
 
     delete data.query
 
-    const req = superagent.post(target).send(data.body)
+    const req = superagent.post(url.format(target)).send(data.body)
 
     delete data.body
 
@@ -36,7 +55,7 @@ class Client {
       if (err) {
         this.logger.error(err)
       } else {
-        this.logger.info(`${req.method} ${req.url} - ${res.statusCode}`)
+        this.logger.info(`${req.method} ${req.url} - ${res.status}`)
       }
     })
   }
@@ -45,15 +64,15 @@ class Client {
     this.logger.info('Connected', this.events.url)
   }
 
-  onerror (err) {
+  onerror (err: any) {
     this.logger.error(err)
   }
 
   start () {
-    const events = new EventSource(this.source)
+    const events = new EventSource(this.source);
 
     // Reconnect immediately
-    events.reconnectInterval = 0
+    (events as any).reconnectInterval = 0 // This isn't a valid property of EventSource
 
     events.addEventListener('message', this.onmessage.bind(this))
     events.addEventListener('open', this.onopen.bind(this))
@@ -66,10 +85,4 @@ class Client {
   }
 }
 
-Client.createChannel = async () => {
-  return superagent.head('https://smee.io/new').redirects(0).catch((err, res) => {
-    return err.response.headers.location
-  })
-}
-
-module.exports = Client
+export = Client
diff --git a/package-lock.json b/package-lock.json
index 6a8c8b5d..420f1e91 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -210,102 +210,132 @@
       }
     },
     "@jest/console": {
-      "version": "24.6.0",
-      "resolved": "https://registry.npmjs.org/@jest/console/-/console-24.6.0.tgz",
-      "integrity": "sha512-nNZbwtZwW6dr7bvZpRBCdBNvZYi+jr6lfnubSOCELk/Km/5csDmGdqeS4qKwGKIVlHTyZ95MYExYevpdh26tDA==",
+      "version": "24.9.0",
+      "resolved": "https://registry.npmjs.org/@jest/console/-/console-24.9.0.tgz",
+      "integrity": "sha512-Zuj6b8TnKXi3q4ymac8EQfc3ea/uhLeCGThFqXeC8H9/raaH8ARPUTdId+XyGd03Z4In0/VjD2OYFcBF09fNLQ==",
       "dev": true,
       "requires": {
-        "@jest/source-map": "^24.3.0",
+        "@jest/source-map": "^24.9.0",
         "chalk": "^2.0.1",
         "slash": "^2.0.0"
       }
     },
-    "@jest/core": {
-      "version": "24.6.0",
-      "resolved": "https://registry.npmjs.org/@jest/core/-/core-24.6.0.tgz",
-      "integrity": "sha512-rZ/5295Geou6o1+vp2+G+p7nV6wITrCR7KSnZc+Dru8QbWAR+M9SPb0BHiRTzQvfVQFkk0AkbTw1GWjCRUX/GA==",
-      "dev": true,
-      "requires": {
-        "@jest/console": "^24.6.0",
-        "@jest/reporters": "^24.6.0",
-        "@jest/test-result": "^24.6.0",
-        "@jest/transform": "^24.6.0",
-        "@jest/types": "^24.6.0",
-        "ansi-escapes": "^3.0.0",
-        "chalk": "^2.0.1",
-        "exit": "^0.1.2",
-        "graceful-fs": "^4.1.15",
-        "jest-changed-files": "^24.6.0",
-        "jest-config": "^24.6.0",
-        "jest-haste-map": "^24.6.0",
-        "jest-message-util": "^24.6.0",
-        "jest-regex-util": "^24.3.0",
-        "jest-resolve-dependencies": "^24.6.0",
-        "jest-runner": "^24.6.0",
-        "jest-runtime": "^24.6.0",
-        "jest-snapshot": "^24.6.0",
-        "jest-util": "^24.6.0",
-        "jest-validate": "^24.6.0",
-        "jest-watcher": "^24.6.0",
-        "micromatch": "^3.1.10",
-        "p-each-series": "^1.0.0",
-        "pirates": "^4.0.1",
-        "realpath-native": "^1.1.0",
-        "rimraf": "^2.5.4",
-        "strip-ansi": "^5.0.0"
-      }
-    },
     "@jest/environment": {
-      "version": "24.6.0",
-      "resolved": "https://registry.npmjs.org/@jest/environment/-/environment-24.6.0.tgz",
-      "integrity": "sha512-LccuUfnREDNFbKmMWrtzUJu6fwU1E6ddYlYSDuClEQvboMKQQMUuCSYXvRUQFtDdeVjUfxkHqfSVvBzuph0b7w==",
+      "version": "24.9.0",
+      "resolved": "https://registry.npmjs.org/@jest/environment/-/environment-24.9.0.tgz",
+      "integrity": "sha512-5A1QluTPhvdIPFYnO3sZC3smkNeXPVELz7ikPbhUj0bQjB07EoE9qtLrem14ZUYWdVayYbsjVwIiL4WBIMV4aQ==",
       "dev": true,
       "requires": {
-        "@jest/fake-timers": "^24.6.0",
-        "@jest/transform": "^24.6.0",
-        "@jest/types": "^24.6.0",
-        "jest-mock": "^24.6.0"
+        "@jest/fake-timers": "^24.9.0",
+        "@jest/transform": "^24.9.0",
+        "@jest/types": "^24.9.0",
+        "jest-mock": "^24.9.0"
+      },
+      "dependencies": {
+        "@jest/types": {
+          "version": "24.9.0",
+          "resolved": "https://registry.npmjs.org/@jest/types/-/types-24.9.0.tgz",
+          "integrity": "sha512-XKK7ze1apu5JWQ5eZjHITP66AX+QsLlbaJRBGYr8pNzwcAE2JVkwnf0yqjHTsDRcjR0mujy/NmZMXw5kl+kGBw==",
+          "dev": true,
+          "requires": {
+            "@types/istanbul-lib-coverage": "^2.0.0",
+            "@types/istanbul-reports": "^1.1.1",
+            "@types/yargs": "^13.0.0"
+          }
+        },
+        "@types/yargs": {
+          "version": "13.0.10",
+          "resolved": "https://registry.npmjs.org/@types/yargs/-/yargs-13.0.10.tgz",
+          "integrity": "sha512-MU10TSgzNABgdzKvQVW1nuuT+sgBMWeXNc3XOs5YXV5SDAK+PPja2eUuBNB9iqElu03xyEDqlnGw0jgl4nbqGQ==",
+          "dev": true,
+          "requires": {
+            "@types/yargs-parser": "*"
+          }
+        }
       }
     },
     "@jest/fake-timers": {
-      "version": "24.6.0",
-      "resolved": "https://registry.npmjs.org/@jest/fake-timers/-/fake-timers-24.6.0.tgz",
-      "integrity": "sha512-92nYqkZceki6knls7F6/FrPxKXnQl0QjYXbjLk/EFfp6xcg4ETLQSAur7pMZsiAzazAgQag/XDvMmKwMbunAeg==",
+      "version": "24.9.0",
+      "resolved": "https://registry.npmjs.org/@jest/fake-timers/-/fake-timers-24.9.0.tgz",
+      "integrity": "sha512-eWQcNa2YSwzXWIMC5KufBh3oWRIijrQFROsIqt6v/NS9Io/gknw1jsAC9c+ih/RQX4A3O7SeWAhQeN0goKhT9A==",
       "dev": true,
       "requires": {
-        "@jest/types": "^24.6.0",
-        "jest-message-util": "^24.6.0",
-        "jest-mock": "^24.6.0"
+        "@jest/types": "^24.9.0",
+        "jest-message-util": "^24.9.0",
+        "jest-mock": "^24.9.0"
+      },
+      "dependencies": {
+        "@jest/types": {
+          "version": "24.9.0",
+          "resolved": "https://registry.npmjs.org/@jest/types/-/types-24.9.0.tgz",
+          "integrity": "sha512-XKK7ze1apu5JWQ5eZjHITP66AX+QsLlbaJRBGYr8pNzwcAE2JVkwnf0yqjHTsDRcjR0mujy/NmZMXw5kl+kGBw==",
+          "dev": true,
+          "requires": {
+            "@types/istanbul-lib-coverage": "^2.0.0",
+            "@types/istanbul-reports": "^1.1.1",
+            "@types/yargs": "^13.0.0"
+          }
+        },
+        "@types/yargs": {
+          "version": "13.0.10",
+          "resolved": "https://registry.npmjs.org/@types/yargs/-/yargs-13.0.10.tgz",
+          "integrity": "sha512-MU10TSgzNABgdzKvQVW1nuuT+sgBMWeXNc3XOs5YXV5SDAK+PPja2eUuBNB9iqElu03xyEDqlnGw0jgl4nbqGQ==",
+          "dev": true,
+          "requires": {
+            "@types/yargs-parser": "*"
+          }
+        }
       }
     },
     "@jest/reporters": {
-      "version": "24.6.0",
-      "resolved": "https://registry.npmjs.org/@jest/reporters/-/reporters-24.6.0.tgz",
-      "integrity": "sha512-fx20elfvGcuImjQZrNPS1fl/uj3mjuSf0vQFUoAPhQDarMzSbekLfRH8ZWt4ir1kpE36dLdFeFkeB8dhaTueIA==",
+      "version": "24.9.0",
+      "resolved": "https://registry.npmjs.org/@jest/reporters/-/reporters-24.9.0.tgz",
+      "integrity": "sha512-mu4X0yjaHrffOsWmVLzitKmmmWSQ3GGuefgNscUSWNiUNcEOSEQk9k3pERKEQVBb0Cnn88+UESIsZEMH3o88Gw==",
       "dev": true,
       "requires": {
-        "@jest/environment": "^24.6.0",
-        "@jest/test-result": "^24.6.0",
-        "@jest/transform": "^24.6.0",
-        "@jest/types": "^24.6.0",
+        "@jest/environment": "^24.9.0",
+        "@jest/test-result": "^24.9.0",
+        "@jest/transform": "^24.9.0",
+        "@jest/types": "^24.9.0",
         "chalk": "^2.0.1",
         "exit": "^0.1.2",
         "glob": "^7.1.2",
-        "istanbul-api": "^2.1.1",
         "istanbul-lib-coverage": "^2.0.2",
         "istanbul-lib-instrument": "^3.0.1",
+        "istanbul-lib-report": "^2.0.4",
         "istanbul-lib-source-maps": "^3.0.1",
-        "jest-haste-map": "^24.6.0",
-        "jest-resolve": "^24.6.0",
-        "jest-runtime": "^24.6.0",
-        "jest-util": "^24.6.0",
+        "istanbul-reports": "^2.2.6",
+        "jest-haste-map": "^24.9.0",
+        "jest-resolve": "^24.9.0",
+        "jest-runtime": "^24.9.0",
+        "jest-util": "^24.9.0",
         "jest-worker": "^24.6.0",
-        "node-notifier": "^5.2.1",
+        "node-notifier": "^5.4.2",
         "slash": "^2.0.0",
         "source-map": "^0.6.0",
         "string-length": "^2.0.0"
       },
       "dependencies": {
+        "@jest/types": {
+          "version": "24.9.0",
+          "resolved": "https://registry.npmjs.org/@jest/types/-/types-24.9.0.tgz",
+          "integrity": "sha512-XKK7ze1apu5JWQ5eZjHITP66AX+QsLlbaJRBGYr8pNzwcAE2JVkwnf0yqjHTsDRcjR0mujy/NmZMXw5kl+kGBw==",
+          "dev": true,
+          "requires": {
+            "@types/istanbul-lib-coverage": "^2.0.0",
+            "@types/istanbul-reports": "^1.1.1",
+            "@types/yargs": "^13.0.0"
+          }
+        },
+        "@types/yargs": {
+          "version": "13.0.10",
+          "resolved": "https://registry.npmjs.org/@types/yargs/-/yargs-13.0.10.tgz",
+          "integrity": "sha512-MU10TSgzNABgdzKvQVW1nuuT+sgBMWeXNc3XOs5YXV5SDAK+PPja2eUuBNB9iqElu03xyEDqlnGw0jgl4nbqGQ==",
+          "dev": true,
+          "requires": {
+            "@types/yargs-parser": "*"
+          }
+        },
         "source-map": {
           "version": "0.6.1",
           "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
@@ -315,9 +345,9 @@
       }
     },
     "@jest/source-map": {
-      "version": "24.3.0",
-      "resolved": "https://registry.npmjs.org/@jest/source-map/-/source-map-24.3.0.tgz",
-      "integrity": "sha512-zALZt1t2ou8le/crCeeiRYzvdnTzaIlpOWaet45lNSqNJUnXbppUUFR4ZUAlzgDmKee4Q5P/tKXypI1RiHwgag==",
+      "version": "24.9.0",
+      "resolved": "https://registry.npmjs.org/@jest/source-map/-/source-map-24.9.0.tgz",
+      "integrity": "sha512-/Xw7xGlsZb4MJzNDgB7PW5crou5JqWiBQaz6xyPd3ArOg2nfn/PunV8+olXbbEZzNl591o5rWKE9BRDaFAuIBg==",
       "dev": true,
       "requires": {
         "callsites": "^3.0.0",
@@ -334,44 +364,245 @@
       }
     },
     "@jest/test-result": {
-      "version": "24.6.0",
-      "resolved": "https://registry.npmjs.org/@jest/test-result/-/test-result-24.6.0.tgz",
-      "integrity": "sha512-k6pdgBBJIDbBgQGZgt8IbQC/KrOAC+fsSZrHw62R54FnfoYzuDqnrbB/AfPJS8T4RjDsWvnAHgXLH866yG10Pg==",
+      "version": "24.9.0",
+      "resolved": "https://registry.npmjs.org/@jest/test-result/-/test-result-24.9.0.tgz",
+      "integrity": "sha512-XEFrHbBonBJ8dGp2JmF8kP/nQI/ImPpygKHwQ/SY+es59Z3L5PI4Qb9TQQMAEeYsThG1xF0k6tmG0tIKATNiiA==",
       "dev": true,
       "requires": {
-        "@jest/console": "^24.6.0",
-        "@jest/types": "^24.6.0",
+        "@jest/console": "^24.9.0",
+        "@jest/types": "^24.9.0",
         "@types/istanbul-lib-coverage": "^2.0.0"
+      },
+      "dependencies": {
+        "@jest/types": {
+          "version": "24.9.0",
+          "resolved": "https://registry.npmjs.org/@jest/types/-/types-24.9.0.tgz",
+          "integrity": "sha512-XKK7ze1apu5JWQ5eZjHITP66AX+QsLlbaJRBGYr8pNzwcAE2JVkwnf0yqjHTsDRcjR0mujy/NmZMXw5kl+kGBw==",
+          "dev": true,
+          "requires": {
+            "@types/istanbul-lib-coverage": "^2.0.0",
+            "@types/istanbul-reports": "^1.1.1",
+            "@types/yargs": "^13.0.0"
+          }
+        },
+        "@types/yargs": {
+          "version": "13.0.10",
+          "resolved": "https://registry.npmjs.org/@types/yargs/-/yargs-13.0.10.tgz",
+          "integrity": "sha512-MU10TSgzNABgdzKvQVW1nuuT+sgBMWeXNc3XOs5YXV5SDAK+PPja2eUuBNB9iqElu03xyEDqlnGw0jgl4nbqGQ==",
+          "dev": true,
+          "requires": {
+            "@types/yargs-parser": "*"
+          }
+        }
+      }
+    },
+    "@jest/test-sequencer": {
+      "version": "24.9.0",
+      "resolved": "https://registry.npmjs.org/@jest/test-sequencer/-/test-sequencer-24.9.0.tgz",
+      "integrity": "sha512-6qqsU4o0kW1dvA95qfNog8v8gkRN9ph6Lz7r96IvZpHdNipP2cBcb07J1Z45mz/VIS01OHJ3pY8T5fUY38tg4A==",
+      "dev": true,
+      "requires": {
+        "@jest/test-result": "^24.9.0",
+        "jest-haste-map": "^24.9.0",
+        "jest-runner": "^24.9.0",
+        "jest-runtime": "^24.9.0"
       }
     },
     "@jest/transform": {
-      "version": "24.6.0",
-      "resolved": "https://registry.npmjs.org/@jest/transform/-/transform-24.6.0.tgz",
-      "integrity": "sha512-aC7Yff2XREV1C/RQCoP1WzO3NU4EtmImIJXnNm4tTgaLoGGv1HJuXziyd5v7zOjBzn96793rF0iLHlFT4w4ErA==",
+      "version": "24.9.0",
+      "resolved": "https://registry.npmjs.org/@jest/transform/-/transform-24.9.0.tgz",
+      "integrity": "sha512-TcQUmyNRxV94S0QpMOnZl0++6RMiqpbH/ZMccFB/amku6Uwvyb1cjYX7xkp5nGNkbX4QPH/FcB6q1HBTHynLmQ==",
       "dev": true,
       "requires": {
         "@babel/core": "^7.1.0",
-        "@jest/types": "^24.6.0",
+        "@jest/types": "^24.9.0",
         "babel-plugin-istanbul": "^5.1.0",
         "chalk": "^2.0.1",
         "convert-source-map": "^1.4.0",
         "fast-json-stable-stringify": "^2.0.0",
         "graceful-fs": "^4.1.15",
-        "jest-haste-map": "^24.6.0",
-        "jest-regex-util": "^24.3.0",
-        "jest-util": "^24.6.0",
+        "jest-haste-map": "^24.9.0",
+        "jest-regex-util": "^24.9.0",
+        "jest-util": "^24.9.0",
         "micromatch": "^3.1.10",
+        "pirates": "^4.0.1",
         "realpath-native": "^1.1.0",
         "slash": "^2.0.0",
         "source-map": "^0.6.1",
         "write-file-atomic": "2.4.1"
       },
       "dependencies": {
+        "@jest/console": {
+          "version": "24.9.0",
+          "resolved": "https://registry.npmjs.org/@jest/console/-/console-24.9.0.tgz",
+          "integrity": "sha512-Zuj6b8TnKXi3q4ymac8EQfc3ea/uhLeCGThFqXeC8H9/raaH8ARPUTdId+XyGd03Z4In0/VjD2OYFcBF09fNLQ==",
+          "dev": true,
+          "requires": {
+            "@jest/source-map": "^24.9.0",
+            "chalk": "^2.0.1",
+            "slash": "^2.0.0"
+          }
+        },
+        "@jest/fake-timers": {
+          "version": "24.9.0",
+          "resolved": "https://registry.npmjs.org/@jest/fake-timers/-/fake-timers-24.9.0.tgz",
+          "integrity": "sha512-eWQcNa2YSwzXWIMC5KufBh3oWRIijrQFROsIqt6v/NS9Io/gknw1jsAC9c+ih/RQX4A3O7SeWAhQeN0goKhT9A==",
+          "dev": true,
+          "requires": {
+            "@jest/types": "^24.9.0",
+            "jest-message-util": "^24.9.0",
+            "jest-mock": "^24.9.0"
+          }
+        },
+        "@jest/source-map": {
+          "version": "24.9.0",
+          "resolved": "https://registry.npmjs.org/@jest/source-map/-/source-map-24.9.0.tgz",
+          "integrity": "sha512-/Xw7xGlsZb4MJzNDgB7PW5crou5JqWiBQaz6xyPd3ArOg2nfn/PunV8+olXbbEZzNl591o5rWKE9BRDaFAuIBg==",
+          "dev": true,
+          "requires": {
+            "callsites": "^3.0.0",
+            "graceful-fs": "^4.1.15",
+            "source-map": "^0.6.0"
+          }
+        },
+        "@jest/test-result": {
+          "version": "24.9.0",
+          "resolved": "https://registry.npmjs.org/@jest/test-result/-/test-result-24.9.0.tgz",
+          "integrity": "sha512-XEFrHbBonBJ8dGp2JmF8kP/nQI/ImPpygKHwQ/SY+es59Z3L5PI4Qb9TQQMAEeYsThG1xF0k6tmG0tIKATNiiA==",
+          "dev": true,
+          "requires": {
+            "@jest/console": "^24.9.0",
+            "@jest/types": "^24.9.0",
+            "@types/istanbul-lib-coverage": "^2.0.0"
+          }
+        },
+        "@jest/types": {
+          "version": "24.9.0",
+          "resolved": "https://registry.npmjs.org/@jest/types/-/types-24.9.0.tgz",
+          "integrity": "sha512-XKK7ze1apu5JWQ5eZjHITP66AX+QsLlbaJRBGYr8pNzwcAE2JVkwnf0yqjHTsDRcjR0mujy/NmZMXw5kl+kGBw==",
+          "dev": true,
+          "requires": {
+            "@types/istanbul-lib-coverage": "^2.0.0",
+            "@types/istanbul-reports": "^1.1.1",
+            "@types/yargs": "^13.0.0"
+          }
+        },
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-      "integrity": "sha512-N+z4pHB4AmUv0SjveWRd6q1Nj5w62m5jodv+GD8lvmbY/83T/rpbJGZOnK5T149OldDj4Db07BSv9xY4K6NTPQ==",
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/sisteransi/-/sisteransi-1.0.5.tgz",
+      "integrity": "sha512-bLGGlR1QxBcynn2d5YmDX4MGjlZvy2MRBDRNHLJ8VI6l6+9FUiyTFNJ0IveOSP0bcXgVDPRcfGqA0pjaqUpfVg==",
       "dev": true
     },
     "slash": {
@@ -5025,9 +6083,9 @@
       }
     },
     "source-map-support": {
-      "version": "0.5.11",
-      "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.11.tgz",
-      "integrity": "sha512-//sajEx/fGL3iw6fltKMdPvy8kL3kJ2O3iuYlRoT3k9Kb4BjOoZ+BZzaNHeuaruSt+Kf3Zk9tnfAQg9/AJqUVQ==",
+      "version": "0.5.19",
+      "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.19.tgz",
+      "integrity": "sha512-Wonm7zOCIJzBGQdB+thsPar0kYuCIzYvxZwlBa87yi/Mdjv7Tip2cyVbLj5o0cFPN4EVkuTwb3GDDyUx2DGnGw==",
       "dev": true,
       "requires": {
         "buffer-from": "^1.0.0",
@@ -5386,9 +6444,9 @@
       "dev": true
     },
     "symbol-tree": {
-      "version": "3.2.2",
-      "resolved": "https://registry.npmjs.org/symbol-tree/-/symbol-tree-3.2.2.tgz",
-      "integrity": "sha1-rifbOPZgp64uHDt9G8KQgZuFGeY=",
+      "version": "3.2.4",
+      "resolved": "https://registry.npmjs.org/symbol-tree/-/symbol-tree-3.2.4.tgz",
+      "integrity": "sha512-9QNk5KwDF+Bvz+PyObkmSYjI5ksVUYtjW7AU22r2NKcfLJcXp96hkDWU3+XndOsUb+AQ9QhfzfCT2O+CNWT5Tw==",
       "dev": true
     },
     "table": {
@@ -5523,6 +6581,47 @@
       "integrity": "sha1-yy4SAwZ+DI3h9hQJS5/kVwTqYAM=",
       "dev": true
     },
+    "ts-jest": {
+      "version": "24.3.0",
+      "resolved": "https://registry.npmjs.org/ts-jest/-/ts-jest-24.3.0.tgz",
+      "integrity": "sha512-Hb94C/+QRIgjVZlJyiWwouYUF+siNJHJHknyspaOcZ+OQAIdFG/UrdQVXw/0B8Z3No34xkUXZJpOTy9alOWdVQ==",
+      "dev": true,
+      "requires": {
+        "bs-logger": "0.x",
+        "buffer-from": "1.x",
+        "fast-json-stable-stringify": "2.x",
+        "json5": "2.x",
+        "lodash.memoize": "4.x",
+        "make-error": "1.x",
+        "mkdirp": "0.x",
+        "resolve": "1.x",
+        "semver": "^5.5",
+        "yargs-parser": "10.x"
+      },
+      "dependencies": {
+        "camelcase": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
+          "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0=",
+          "dev": true
+        },
+        "semver": {
+          "version": "5.7.1",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+          "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
+          "dev": true
+        },
+        "yargs-parser": {
+          "version": "10.1.0",
+          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-10.1.0.tgz",
+          "integrity": "sha512-VCIyR1wJoEBZUqk5PA+oOBF6ypbwh5aNB3I50guxAL/quggdfs4TtNHQrSazFA3fYZ+tEqfs0zIGlv0c/rgjbQ==",
+          "dev": true,
+          "requires": {
+            "camelcase": "^4.1.0"
+          }
+        }
+      }
+    },
     "tunnel-agent": {
       "version": "0.6.0",
       "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
@@ -5553,59 +6652,22 @@
       "integrity": "sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g==",
       "dev": true
     },
-    "uglify-js": {
-      "version": "3.5.3",
-      "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.5.3.tgz",
-      "integrity": "sha512-rIQPT2UMDnk4jRX+w4WO84/pebU2jiLsjgIyrCktYgSvx28enOE3iYQMr+BD1rHiitWnDmpu0cY/LfIEpKcjcw==",
-      "dev": true,
-      "optional": true,
-      "requires": {
-        "commander": "~2.19.0",
-        "source-map": "~0.6.1"
-      },
-      "dependencies": {
-        "source-map": {
-          "version": "0.6.1",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
-          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
-          "dev": true,
-          "optional": true
-        }
-      }
+    "typescript": {
+      "version": "3.9.7",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.7.tgz",
+      "integrity": "sha512-BLbiRkiBzAwsjut4x/dsibSTB6yWpwT5qWmC2OfuCg3GgVQCSgMs4vEctYPhsaGtd0AeuuHMkjZ2h2WG8MSzRw==",
+      "dev": true
     },
     "union-value": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.0.tgz",
-      "integrity": "sha1-XHHDTLW61dzr4+oM0IIHulqhrqQ=",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.1.tgz",
+      "integrity": "sha512-tJfXmxMeWYnczCVs7XAEvIV7ieppALdyepWMkHkwciRpZraG/xwT+s2JN8+pr1+8jCRf80FFzvr+MpQeeoF4Xg==",
       "dev": true,
       "requires": {
         "arr-union": "^3.1.0",
         "get-value": "^2.0.6",
         "is-extendable": "^0.1.1",
-        "set-value": "^0.4.3"
-      },
-      "dependencies": {
-        "extend-shallow": {
-          "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-2.0.1.tgz",
-          "integrity": "sha1-Ua99YUrZqfYQ6huvu5idaxxWiQ8=",
-          "dev": true,
-          "requires": {
-            "is-extendable": "^0.1.0"
-          }
-        },
-        "set-value": {
-          "version": "0.4.3",
-          "resolved": "https://registry.npmjs.org/set-value/-/set-value-0.4.3.tgz",
-          "integrity": "sha1-fbCPnT0i3H945Trzw79GZuzfzPE=",
-          "dev": true,
-          "requires": {
-            "extend-shallow": "^2.0.1",
-            "is-extendable": "^0.1.1",
-            "is-plain-object": "^2.0.1",
-            "to-object-path": "^0.3.0"
-          }
-        }
+        "set-value": "^2.0.1"
       }
     },
     "uniq": {
@@ -5700,9 +6762,9 @@
       }
     },
     "uuid": {
-      "version": "3.3.2",
-      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.3.2.tgz",
-      "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==",
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
+      "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A==",
       "dev": true
     },
     "validate-npm-package-license": {
@@ -5732,12 +6794,12 @@
       }
     },
     "w3c-hr-time": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/w3c-hr-time/-/w3c-hr-time-1.0.1.tgz",
-      "integrity": "sha1-gqwr/2PZUOqeMYmlimViX+3xkEU=",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/w3c-hr-time/-/w3c-hr-time-1.0.2.tgz",
+      "integrity": "sha512-z8P5DvDNjKDoFIHK7q8r8lackT6l+jo/Ye3HOle7l9nICP9lf1Ci25fy9vHd0JOWewkIFzXIEig3TdKT7JQ5fQ==",
       "dev": true,
       "requires": {
-        "browser-process-hrtime": "^0.1.2"
+        "browser-process-hrtime": "^1.0.0"
       }
     },
     "walker": {
@@ -5796,55 +6858,26 @@
       "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=",
       "dev": true
     },
-    "wordwrap": {
-      "version": "0.0.3",
-      "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.3.tgz",
-      "integrity": "sha1-o9XabNXAvAAI03I0u68b7WMFkQc=",
-      "dev": true
-    },
     "wrap-ansi": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
-      "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-5.1.0.tgz",
+      "integrity": "sha512-QC1/iN/2/RPVJ5jYK8BGttj5z83LmSKmvbvrXPNCLZSEb32KKVDJDl/MOt2N01qU2H/FkzEa9PKto1BqDjtd7Q==",
       "dev": true,
       "requires": {
-        "string-width": "^1.0.1",
-        "strip-ansi": "^3.0.1"
+        "ansi-styles": "^3.2.0",
+        "string-width": "^3.0.0",
+        "strip-ansi": "^5.0.0"
       },
       "dependencies": {
-        "ansi-regex": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
-          "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
-          "dev": true
-        },
-        "is-fullwidth-code-point": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
-          "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
-          "dev": true,
-          "requires": {
-            "number-is-nan": "^1.0.0"
-          }
-        },
         "string-width": {
-          "version": "1.0.2",
-          "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
-          "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
-          "dev": true,
-          "requires": {
-            "code-point-at": "^1.0.0",
-            "is-fullwidth-code-point": "^1.0.0",
-            "strip-ansi": "^3.0.0"
-          }
-        },
-        "strip-ansi": {
-          "version": "3.0.1",
-          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
-          "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
+          "integrity": "sha512-vafcv6KjVZKSgz06oM/H6GDBrAtz8vdhQakGjFIvNrHA6y3HCF1CInLy+QLq8dTJPQ1b+KDUqDFctkdRW44e1w==",
           "dev": true,
           "requires": {
-            "ansi-regex": "^2.0.0"
+            "emoji-regex": "^7.0.1",
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^5.1.0"
           }
         }
       }
@@ -5903,29 +6936,46 @@
       "dev": true
     },
     "yargs": {
-      "version": "12.0.5",
-      "resolved": "https://registry.npmjs.org/yargs/-/yargs-12.0.5.tgz",
-      "integrity": "sha512-Lhz8TLaYnxq/2ObqHDql8dX8CJi97oHxrjUcYtzKbbykPtVW9WB+poxI+NM2UIzsMgNCZTIf0AQwsjK5yMAqZw==",
+      "version": "13.3.2",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-13.3.2.tgz",
+      "integrity": "sha512-AX3Zw5iPruN5ie6xGRIDgqkT+ZhnRlZMLMHAs8tg7nRruy2Nb+i5o9bwghAogtM08q1dpr2LVoS8KSTMYpWXUw==",
       "dev": true,
       "requires": {
-        "cliui": "^4.0.0",
-        "decamelize": "^1.2.0",
+        "cliui": "^5.0.0",
         "find-up": "^3.0.0",
-        "get-caller-file": "^1.0.1",
-        "os-locale": "^3.0.0",
+        "get-caller-file": "^2.0.1",
         "require-directory": "^2.1.1",
-        "require-main-filename": "^1.0.1",
+        "require-main-filename": "^2.0.0",
         "set-blocking": "^2.0.0",
-        "string-width": "^2.0.0",
+        "string-width": "^3.0.0",
         "which-module": "^2.0.0",
-        "y18n": "^3.2.1 || ^4.0.0",
-        "yargs-parser": "^11.1.1"
+        "y18n": "^4.0.0",
+        "yargs-parser": "^13.1.2"
+      },
+      "dependencies": {
+        "require-main-filename": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/require-main-filename/-/require-main-filename-2.0.0.tgz",
+          "integrity": "sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg==",
+          "dev": true
+        },
+        "string-width": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
+          "integrity": "sha512-vafcv6KjVZKSgz06oM/H6GDBrAtz8vdhQakGjFIvNrHA6y3HCF1CInLy+QLq8dTJPQ1b+KDUqDFctkdRW44e1w==",
+          "dev": true,
+          "requires": {
+            "emoji-regex": "^7.0.1",
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^5.1.0"
+          }
+        }
       }
     },
     "yargs-parser": {
-      "version": "11.1.1",
-      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-11.1.1.tgz",
-      "integrity": "sha512-C6kB/WJDiaxONLJQnF8ccx9SEeoTTLek8RVbaOIsrAUS8VrBEXfmeSnCZxygc+XC2sNMBIwOOnfcxiynjHsVSQ==",
+      "version": "13.1.2",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-13.1.2.tgz",
+      "integrity": "sha512-3lbsNRf/j+A4QuSZfDRA7HRSfWrzO0YjqTJd5kjAq37Zep1CEgaYmrH9Q3GwPiB9cHyd1Y1UwggGhJGoxipbzg==",
       "dev": true,
       "requires": {
         "camelcase": "^5.0.0",
diff --git a/package.json b/package.json
index 8d611755..5ff3aba0 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,8 @@
     "smee": "./bin/smee.js"
   },
   "scripts": {
-    "test": "jest --coverage && standard"
+    "test": "jest --coverage && standard",
+    "build": "tsc -p tsconfig.json"
   },
   "repository": {
     "type": "git",
@@ -28,17 +29,27 @@
   },
   "devDependencies": {
     "@babel/core": "^7.4.0",
+    "@types/eventsource": "^1.1.0",
+    "@types/jest": "^24.0.11",
+    "@types/nock": "^9.3.1",
+    "@types/superagent": "^4.1.1",
+    "@types/validator": "^10.11.0",
     "babel-core": "^7.0.0-bridge.0",
     "babel-jest": "^24.5.0",
     "connect-sse": "^1.2.0",
     "jest": "^24.5.0",
     "nock": "^10.0.6",
     "standard": "^12.0.1",
-    "supertest": "^4.0.2"
+    "supertest": "^4.0.2",
+    "ts-jest": "^24.0.1",
+    "typescript": "^3.4.1"
   },
   "standard": {
     "env": [
       "jest"
     ]
+  },
+  "jest": {
+    "preset": "ts-jest"
   }
 }
diff --git a/test/index.test.js b/test/index.test.ts
similarity index 86%
rename from test/index.test.js
rename to test/index.test.ts
index af1860e1..d31c0209 100644
--- a/test/index.test.js
+++ b/test/index.test.ts
@@ -1,5 +1,5 @@
-const Client = require('..')
-const nock = require('nock')
+import Client = require('..')
+import nock = require('nock')
 
 describe('client', () => {
   describe('createChannel', () => {
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 00000000..b954444a
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,63 @@
+{
+  "compilerOptions": {
+    /* Basic Options */
+    "target": "es2017",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
+    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
+    // "lib": [],                             /* Specify library files to be included in the compilation. */
+    // "allowJs": true,                       /* Allow javascript files to be compiled. */
+    // "checkJs": true,                       /* Report errors in .js files. */
+    // "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
+    "declaration": true,                   /* Generates corresponding '.d.ts' file. */
+    // "declarationMap": true,                /* Generates a sourcemap for each corresponding '.d.ts' file. */
+    // "sourceMap": true,                     /* Generates corresponding '.map' file. */
+    // "outFile": "./",                       /* Concatenate and emit output to single file. */
+    "outDir": "./",                        /* Redirect output structure to the directory. */
+    // "rootDir": "./",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
+    "composite": true,                     /* Enable project compilation */
+    // "removeComments": true,                /* Do not emit comments to output. */
+    // "noEmit": true,                        /* Do not emit outputs. */
+    // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
+    // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
+    // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
+
+    /* Strict Type-Checking Options */
+    "strict": true,                           /* Enable all strict type-checking options. */
+    "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
+    // "strictNullChecks": true,              /* Enable strict null checks. */
+    // "strictFunctionTypes": true,           /* Enable strict checking of function types. */
+    // "strictBindCallApply": true,           /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
+    // "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
+    // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
+    // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */
+
+    /* Additional Checks */
+    // "noUnusedLocals": true,                /* Report errors on unused locals. */
+    // "noUnusedParameters": true,            /* Report errors on unused parameters. */
+    // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
+    // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
+
+    /* Module Resolution Options */
+    // "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
+    // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
+    // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
+    // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
+    // "typeRoots": [],                       /* List of folders to include type definitions from. */
+    // "types": [],                           /* Type declaration files to be included in compilation. */
+    // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
+    "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
+
+    /* Source Map Options */
+    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
+    // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
+
+    /* Experimental Options */
+    // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
+    // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
+
+  },
+  "include": ["./*"],
+  "files": ["index.ts"]
+}