diff --git a/prosemirror-collab/index.d.ts b/prosemirror-collab/index.d.ts
new file mode 100644
index 0000000000..c10dc62199
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+++ b/prosemirror-collab/index.d.ts
@@ -0,0 +1,17 @@
+// Type definitions for prosemirror-collab 0.18.0
+// Project: https://github.com/ProseMirror/prosemirror-collab
+// Definitions by: David Hahn <https://github.com/davidka>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+import { Plugin } from 'prosemirror-state'
+import { EditorState } from 'prosemirror-state'
+import { Step } from 'prosemirror-transform'
+import { Transaction } from 'prosemirror-state'
+
+declare module "prosemirror-collab" {
+  export function collab(config?: { version?: number, clientID?: number }): Plugin
+  export function receiveTransaction(state: EditorState, steps: Step[], clientIDs: number[]): Transaction
+  export function sendableSteps(state: EditorState): { version: number, steps: Step[], clientID: number, origins: Transaction[] } | void
+  export function getVersion(state: EditorState): number
+
+}
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diff --git a/prosemirror-collab/prosemirror-collab-tests.ts b/prosemirror-collab/prosemirror-collab-tests.ts
new file mode 100644
index 0000000000..43071590d6
--- /dev/null
+++ b/prosemirror-collab/prosemirror-collab-tests.ts
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+import * as collab from 'prosemirror-collab';
+import {EditorState} from 'prosemirror-state';
+
+let state = new EditorState();
+let version = collab.getVersion(state);
diff --git a/prosemirror-collab/tsconfig.json b/prosemirror-collab/tsconfig.json
new file mode 100644
index 0000000000..f3d733cd97
--- /dev/null
+++ b/prosemirror-collab/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6",
+            "dom"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "prosemirror-collab-tests.ts"
+    ]
+}
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