diff --git a/types/co/co-tests.ts b/types/co/co-tests.ts
new file mode 100644
index 0000000000..159a2e90fb
--- /dev/null
+++ b/types/co/co-tests.ts
@@ -0,0 +1,30 @@
+import co = require('co');
+
+function* gen(num: number, str: string, arr: number[], obj: object, fun: () => void) {
+    return num;
+}
+
+co(gen, 42, 'forty-two', [42], { value: 42 }, () => {})
+    .then((num: number) => {}, (err: Error) => {})
+    .catch((err: Error) => {});
+
+co.default(gen, 42, 'forty-two', [42], { value: 42 }, () => {})
+    .then((num: number) => {}, (err: Error) => {})
+    .catch((err: Error) => {});
+
+co.co(gen, 42, 'forty-two', [42], { value: 42 }, () => {})
+    .then((num: number) => {}, (err: Error) => {})
+    .catch((err: Error) => {});
+
+co.wrap(gen)(42, 'forty-two', [42], { value: 42 }, () => {})
+    .then((num: number) => {}, (err: Error) => {})
+    .catch((err: Error) => {});
+
+// $ExpectError
+co(gen, 42, 'forty-two', [42], { value: 42 }, () => {}).then((str: string) => {});
+
+// $ExpectError
+co.wrap(gen)();
+
+// $ExpectError
+co.wrap(gen)('forty-two');
diff --git a/types/co/index.d.ts b/types/co/index.d.ts
new file mode 100644
index 0000000000..958c222a14
--- /dev/null
+++ b/types/co/index.d.ts
@@ -0,0 +1,18 @@
+// Type definitions for co 4.6
+// Project: https://github.com/tj/co#readme
+// Definitions by: Doniyor Aliyev <https://github.com/doniyor2109>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 3.1
+
+type ExtractType<T> = T extends IterableIterator<infer R> ? R : never;
+
+interface Co {
+    <F extends (...args: any[]) => Generator>(fn: F, ...args: Parameters<F>): Promise<ExtractType<ReturnType<F>>>;
+    default: Co;
+    co: Co;
+    wrap: <F extends (...args: any[]) => Generator>(fn: F) => (...args: Parameters<F>) => Promise<ExtractType<ReturnType<F>>>;
+}
+
+declare const co: Co;
+
+export = co;
diff --git a/types/co/tsconfig.json b/types/co/tsconfig.json
new file mode 100644
index 0000000000..bc5a88eb32
--- /dev/null
+++ b/types/co/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "co-tests.ts"
+    ]
+}
diff --git a/types/co/tslint.json b/types/co/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/co/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }