diff --git a/types/documentdb-session/documentdb-session-tests.ts b/types/documentdb-session/documentdb-session-tests.ts
new file mode 100644
index 0000000000..af5dba62cb
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+++ b/types/documentdb-session/documentdb-session-tests.ts
@@ -0,0 +1,18 @@
+import express = require("express");
+import session = require("express-session");
+import DocumentDBSession = require("documentdb-session");
+
+const DocumentDBStore = DocumentDBSession(session);
+const store = new DocumentDBStore({
+    database: "MY_DATABASE",
+    collection: "MY_COLLECTION",
+    host: "https://sample.documents.azure.com:443/",
+    ttl: 60 * 60 * 10, // 10 hours
+    key: "magic key"
+});
+
+const app = express();
+session({
+    store,
+    secret: "I can count all the way to 55",
+});
diff --git a/types/documentdb-session/index.d.ts b/types/documentdb-session/index.d.ts
new file mode 100644
index 0000000000..69914bdc6c
--- /dev/null
+++ b/types/documentdb-session/index.d.ts
@@ -0,0 +1,63 @@
+// Type definitions for documentdb-session 1.0
+// Project: https://github.com/dwhieb/documentdb-session#readme
+// Definitions by: Daniel Rosenwasser <https://github.com/DanielRosenwasser>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.2
+
+import session = require("express-session");
+
+export = DocumentDBSession;
+
+declare function DocumentDBSession(expressSession: typeof session): DocumentDBStoreConstructor;
+
+interface DocumentDBStoreConstructor {
+    new (options: Options): session.Store;
+}
+
+interface Options {
+    /**
+     * The ID of the collection where the session data should be stored.
+     * If the collection does not exist, it will be created when the session store initializes.
+     * The collection may contain other data, or it may be a dedicated collection just for sessions.
+     *
+     * @default `"sessions"`
+     */
+    collection?: string;
+
+    /**
+     * The ID of the database where the session data should be stored.
+     * If the database does not exist, it will be creaed when the session store initializes.
+     *
+     * @default `"sessionstore"`
+     */
+    database?: string;
+
+    /**
+     * By default, `documentdb-session` sets a `"type"` attribute on each session document with a value of `"session"`,
+     * to distinguish session documents from other documents in the collection.
+     * If you would like a different attribute or value to be used to discriminate session documents from other documents,
+     * enter that as an attribute-value pair in an object here, e.g. `{ site: "mysite.com" }` or `{ _type: "session" }`.
+     *
+     * @default `{ type: "session" }`
+     */
+    discriminator?: object;
+    /**
+     * The URL / hostname of your DocumentDB database account, usually of the form `https://mydbaccount.documents.azure.com:443/`.
+     * You can also provide this in an environment variable, (`DOCUMENTDB_URL`) instead.
+     */
+    host: string;
+    /**
+     * The primary key for your DocumentDB account.
+     * A primary key is required because `documentdb-session` may create a new database for your account, if none exists.
+     * You can also provide this in an environment variable (`DOCUMENTDB_KEY`) instead.
+     */
+    key: string;
+    /**
+     * The TTL (time-to-live or expiration time) for your sessions, in seconds.
+     * After this time has elapsed since the last change to the session data, the session will be deleted.
+     * A session's TTL is extended each time session data is changed, restarting the timer.
+     * See more on [**Configuring TTL**](https://github.com/dwhieb/documentdb-session#configuring-ttl-time-to-live-or-expiration-time).
+     * *Enabling TTL is strongly recommended.*
+     */
+    ttl?: number;
+}
diff --git a/types/documentdb-session/tsconfig.json b/types/documentdb-session/tsconfig.json
new file mode 100644
index 0000000000..478f009cc6
--- /dev/null
+++ b/types/documentdb-session/tsconfig.json
@@ -0,0 +1,22 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "documentdb-session-tests.ts"
+    ]
+}
diff --git a/types/documentdb-session/tslint.json b/types/documentdb-session/tslint.json
new file mode 100644
index 0000000000..4978339df9
--- /dev/null
+++ b/types/documentdb-session/tslint.json
@@ -0,0 +1,6 @@
+{
+    "extends": "dtslint/dt.json",
+    "rules": {
+        "no-irregular-whitespace": false
+    }
+}
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