diff --git a/types/toposort/index.d.ts b/types/toposort/index.d.ts
new file mode 100644
index 0000000000..8da78b7d11
--- /dev/null
+++ b/types/toposort/index.d.ts
@@ -0,0 +1,6 @@
+// Type definitions for toposort 2.0
+// Project: https://github.com/marcelklehr/toposort
+// Definitions by: Daniel Byrne <https://github.com/danwbyrne>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+export default function toposort(graph: ReadonlyArray<[string, string]>): ReadonlyArray<string>;
diff --git a/types/toposort/toposort-tests.ts b/types/toposort/toposort-tests.ts
new file mode 100644
index 0000000000..201277fefa
--- /dev/null
+++ b/types/toposort/toposort-tests.ts
@@ -0,0 +1,19 @@
+import toposort from 'toposort';
+
+const testGraph: ReadonlyArray<[string, string]> = [
+  [
+    'string1',
+    'string2',
+  ],
+  [
+    'string2',
+    'string3',
+  ],
+  [
+    'string3',
+    'string1',
+  ],
+];
+
+// $ExpectType ReadonlyArray<string>
+toposort(testGraph);
diff --git a/types/toposort/tsconfig.json b/types/toposort/tsconfig.json
new file mode 100644
index 0000000000..3524da0d19
--- /dev/null
+++ b/types/toposort/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": false,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "toposort-tests.ts"
+    ]
+}
diff --git a/types/toposort/tslint.json b/types/toposort/tslint.json
new file mode 100644
index 0000000000..d88586e5bd
--- /dev/null
+++ b/types/toposort/tslint.json
@@ -0,0 +1,3 @@
+{
+  "extends": "dtslint/dt.json"
+}