diff --git a/types/koa-convert/index.d.ts b/types/koa-convert/index.d.ts
new file mode 100644
index 0000000000..ed5cd38480
--- /dev/null
+++ b/types/koa-convert/index.d.ts
@@ -0,0 +1,13 @@
+// Type definitions for koa-convert 1.2
+// Project: https://github.com/koajs/convert
+// Definitions by: Daniel Byrne <https://github.com/danwbyrne>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.3
+
+import { Context, Middleware } from "koa";
+
+declare function convert(
+    mw: (context: Context, next: () => void) => Generator
+): Middleware;
+
+export = convert;
diff --git a/types/koa-convert/koa-convert-tests.ts b/types/koa-convert/koa-convert-tests.ts
new file mode 100644
index 0000000000..0a795e522b
--- /dev/null
+++ b/types/koa-convert/koa-convert-tests.ts
@@ -0,0 +1,16 @@
+import convert = require('koa-convert');
+import Koa = require('koa');
+
+const app = new Koa();
+
+app.use(modernMiddleware);
+
+app.use(convert(legacyMiddleware));
+
+function * legacyMiddleware(next: any) {
+  yield next;
+}
+
+function modernMiddleware(ctx: Koa.Context, next: any) {
+  return next().then(() => {});
+}
diff --git a/types/koa-convert/tsconfig.json b/types/koa-convert/tsconfig.json
new file mode 100644
index 0000000000..c86211adaa
--- /dev/null
+++ b/types/koa-convert/tsconfig.json
@@ -0,0 +1,19 @@
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "lib": ["es6"],
+    "noImplicitAny": true,
+    "noImplicitThis": true,
+    "strictNullChecks": true,
+    "strictFunctionTypes": true,
+    "baseUrl": "../",
+    "typeRoots": ["../"],
+    "types": [],
+    "noEmit": true,
+    "forceConsistentCasingInFileNames": true
+  },
+  "files": [
+		"index.d.ts",
+		"koa-convert-tests.ts"
+	]
+}
diff --git a/types/koa-convert/tslint.json b/types/koa-convert/tslint.json
new file mode 100644
index 0000000000..d88586e5bd
--- /dev/null
+++ b/types/koa-convert/tslint.json
@@ -0,0 +1,3 @@
+{
+  "extends": "dtslint/dt.json"
+}