diff --git a/package-lock.json b/package-lock.json
index 8378e92..d2cb99e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,9 +1,15 @@
 {
   "name": "bluestream",
-  "version": "6.0.3",
+  "version": "0.0.0-development",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
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+      "resolved": "https://registry.npmjs.org/@types/node/-/node-9.4.6.tgz",
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+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.1.2.tgz",
@@ -48,7 +54,7 @@
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+      "integrity": "sha1-7D6LTp+AZPwCw6ybZfHCdb2o75I=",
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@@ -66,7 +72,7 @@
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+      "integrity": "sha1-NgSLv/TntH4TZkQxbJlmnqWukfE=",
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+      "integrity": "sha1-ry87iPpvXB5MY00aD46sT1WzleM=",
       "dev": true
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+      "integrity": "sha1-gVyZ6oT2gJUp0vRXkb34JxE1LWY=",
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@@ -1044,7 +1050,7 @@
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+      "integrity": "sha1-XRKFFd8TT/Mn6QpMk/Tgd6U2NB8=",
       "dev": true,
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@@ -1180,7 +1186,7 @@
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+          "integrity": "sha1-wVm41b4PnlpvNG2rlPFs4CIWG4g=",
           "dev": true,
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@@ -1200,7 +1206,7 @@
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+          "integrity": "sha1-W7WgZyYotkFJVmuhaBnmFRjGcmE=",
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+      "integrity": "sha1-q67IJBd2E7ipWymWOeG2+s9HNEk=",
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+      "integrity": "sha1-VLdljI9FSBPcKocK/4FS7ElpunU=",
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+      "integrity": "sha1-RJnt3NERDgshi6zy+n9/WfVcqAQ=",
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@@ -2539,7 +2545,7 @@
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-      "integrity": "sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A==",
+      "integrity": "sha1-pWiZ0+o8m6uHS7l3O3xe3pL0iV0=",
       "dev": true
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@@ -2557,7 +2563,7 @@
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+      "integrity": "sha1-wZyd+aAocC1nhhI4SmVSQExjbRU=",
       "dev": true,
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@@ -2591,7 +2597,7 @@
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+      "integrity": "sha1-qjiWs+abSH8X4x7SFD1pqOMMLYo=",
       "dev": true
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@@ -2669,13 +2675,13 @@
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+      "integrity": "sha1-bWDjSzq7yDEwYsO3mO+NkBoHrzw=",
       "dev": true
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       "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.19.tgz",
-      "integrity": "sha512-oTZqweIP51xaGPI4uPa56/Pri/480R+mo7SeU+YETByQNhDG55ycFyNLIgta9vXhILrxXDmF7ZGhqZIcuN0gJQ==",
+      "integrity": "sha1-90aPYBNfXl2tM5nAqBvpoWA6CCs=",
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@@ -2709,7 +2715,7 @@
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+      "integrity": "sha1-ndLyrXZdyrH/BEO0kUQqILoifck=",
       "dev": true,
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@@ -2737,7 +2743,7 @@
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+          "integrity": "sha1-wVm41b4PnlpvNG2rlPFs4CIWG4g=",
           "dev": true,
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@@ -2962,7 +2968,7 @@
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-      "integrity": "sha512-O2v52ffjLa9VeM43J4XocZE//WT9N0IiwDa3KSHH7Tu8CtH+1qM8SIZvnsTh6v+4yFy5KUY3BHUVwjpfAWsjIA==",
+      "integrity": "sha1-LnhEFka9RoLpY/IrbpKCPDCcYtw=",
       "dev": true,
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@@ -3155,7 +3161,7 @@
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+      "integrity": "sha1-Yi4y6CSItJJ5EUpPns9F581rulU=",
       "dev": true,
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@@ -3193,7 +3199,7 @@
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+      "integrity": "sha1-UWbihkV/AzBgZL5Ul+jbsMPTIIM=",
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@@ -3217,7 +3223,7 @@
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@@ -3519,7 +3525,7 @@
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@@ -3942,7 +3948,7 @@
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@@ -3969,7 +3975,7 @@
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@@ -4019,7 +4025,7 @@
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@@ -4072,7 +4078,7 @@
     "tmp": {
       "version": "0.0.33",
       "resolved": "https://registry.npmjs.org/tmp/-/tmp-0.0.33.tgz",
-      "integrity": "sha512-jRCJlojKnZ3addtTOjdIqoRuPEKBvNXcGYqzO6zWZX8KfKEpnGY5jfggJQ3EjKuu8D4bJRr0y+cYJFmYbImXGw==",
+      "integrity": "sha1-bTQzWIl2jSGyvNoKonfO07G/rfk=",
       "dev": true,
       "requires": {
         "os-tmpdir": "1.0.2"
@@ -4151,7 +4157,7 @@
     "which": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/which/-/which-1.3.0.tgz",
-      "integrity": "sha512-xcJpopdamTuY5duC/KnTTNBraPK54YwpenP4lzxU8H91GudWpFv38u0CKjclE1Wi2EH2EDz5LRcHcKbCIzqGyg==",
+      "integrity": "sha1-/wS9/AEO5UfXgL7DjhrBwnd9JTo=",
       "dev": true,
       "requires": {
         "isexe": "2.0.0"
diff --git a/package.json b/package.json
index 1ed918f..89b2480 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "version": "0.0.0-development",
   "description": "A collection of streams that work well with promises (through, map, reduce). Through2 with promise support",
   "main": "dist",
+  "types": "dist/index.d.ts",
   "repository": "git@github.com:bustle/bluestream.git",
   "homepage": "https://github.com/bustle/bluestream",
   "runkitExampleFilename": "example.js",
@@ -10,7 +11,7 @@
     "test": "npm run unit-test && npm run lint",
     "unit-test": "mocha",
     "lint": "eslint lib test",
-    "build": "babel lib/ -d dist/",
+    "build": "babel lib/ -d dist/ && cp ./types/* ./dist/.",
     "prepublish": "npm run build",
     "semantic-release": "semantic-release pre && npm publish && semantic-release post"
   },
@@ -30,6 +31,7 @@
   "license": "MIT",
   "dependencies": {},
   "devDependencies": {
+    "@types/node": "^9.4.6",
     "babel-cli": "^6.26.0",
     "babel-plugin-transform-object-rest-spread": "^6.26.0",
     "babel-preset-env": "^1.6.0",
@@ -43,12 +45,15 @@
     "eslint-plugin-promise": "^3.5.0",
     "eslint-plugin-standard": "^3.0.1",
     "mocha": "^3.5.0",
-    "split2": "^2.2.0",
-    "semantic-release": "^8.2.0"
+    "semantic-release": "^8.2.0",
+    "split2": "^2.2.0"
   },
   "engines": {
     "node": ">=6"
   },
+  "compilerOptions": {
+    "moduleResolution": "node"
+  },
   "eslintConfig": {
     "env": {
       "node": true,
diff --git a/types/index.d.ts b/types/index.d.ts
new file mode 100644
index 0000000..27a38a8
--- /dev/null
+++ b/types/index.d.ts
@@ -0,0 +1,65 @@
+export interface DeferReturn {
+  resolve: Function,
+  reject: Function,
+  promise: Promise<any>
+}
+
+export interface StreamOptions {
+  concurrent?: 1,
+  objectMode?: true,
+  [others: string]: any
+}
+
+export class FilterStream {
+  constructor(options: StreamOptions, fn?: Function);
+}
+
+export class ReadStream {
+  constructor(options: StreamOptions, fn?: Function);
+
+  promise(): Promise<void>;
+
+  push(data: (any|Promise<any>)): Promise<void>;
+}
+
+export class ReduceStream {
+  constructor(options: StreamOptions, fn?: Function);
+
+  promise(): Promise<void>;
+}
+
+export class TransformStream {
+  constructor(options: StreamOptions, fn?: Function);
+
+  end(chunk: any, encoding: string, cb: Function): Promise<void>;
+
+  promise(): Promise<void>;
+
+  push(data: (any|Promise<any>)): Promise<void>;
+}
+
+export class WriteStream {
+  constructor(options: StreamOptions, fn?: Function);
+
+  end(chunk: any, encoding: string, cb: Function): void;
+
+  promise(): Promise<void>;
+}
+
+export function collect(stream: ReadStream|WriteStream|TransformStream): (Object[]|Buffer|String|null);
+
+export function filter(opts: StreamOptions, fn?: Function): FilterStream;
+
+export function map(opts: StreamOptions, fn?: Function): TransformStream;
+
+export function pipe(...streams: (ReadStream|WriteStream|TransformStream)[]): Promise<void>;
+
+export function read(opts: StreamOptions, readFn: Function): ReadStream;
+
+export function reduce(opts: StreamOptions, fn?: Function, initial?: any): ReduceStream;
+
+export function transform(opts: StreamOptions, fn?: Function): TransformStream;
+
+export function wait(stream: any): Promise<void>;
+
+export function write(opts: StreamOptions, writeFn: Function): WriteStream;