diff --git a/types/osmosis/index.d.ts b/types/osmosis/index.d.ts
index 4c03388047..8d9f640f8b 100644
--- a/types/osmosis/index.d.ts
+++ b/types/osmosis/index.d.ts
@@ -56,8 +56,33 @@ interface Osmosis {
      * result data, osmosis finished
      */
     data(callback: (param: any) => any): Osmosis;
-  }
 
-  declare const osmosis: Osmosis;
+    /**
+     * Set configuration options for the **preceeding** command on down the chain.
+     */
+    config(option: string | { [key: string]: any }, value?: any): Osmosis;
 
-  export = osmosis;
+    /**
+     * Set a cookie. Short for `.config({ cookies: ... })`. Note: Setting a cookie to `null` will delete the cookie.
+     */
+    cookie(name: string, value: string | null): Osmosis;
+
+    /**
+     * Set an HTTP header. Short for `.config({ headers: ... })`
+     */
+    header(name: string, value: string): Osmosis;
+
+    /**
+     * Set multiple HTTP headers. Short for `.config({ headers: ... })`.
+     */
+    headers(headers: { [key: string]: string }): Osmosis;
+
+    /**
+     * Call a callback when the Osmosis instance has completely finished.
+     */
+    done(callback: () => any): Osmosis;
+}
+
+declare const osmosis: Osmosis;
+
+export = osmosis;
diff --git a/types/osmosis/osmosis-tests.ts b/types/osmosis/osmosis-tests.ts
index f0c39d4312..94f08db15e 100644
--- a/types/osmosis/osmosis-tests.ts
+++ b/types/osmosis/osmosis-tests.ts
@@ -12,9 +12,15 @@ const errorFunction = (error: string) => {
     const myError = error;
 };
 
-// example is from https://github.com/rchipka/node-osmosis#example
+const doneFunction = () => {};
+
+// modified example from https://github.com/rchipka/node-osmosis#example
 
 osmosis
+    .config({ headers: { 'test-header-name': 'test-header-value' } })
+    .headers({ 'test-header-name': 'test-header-value' })
+    .header('test-header-name', 'test-header-value')
+    .cookie('test-cookie-name', 'test-cookie-value')
     .get('www.craigslist.org/about/sites')
     .find('h1 + div a')
     .set('location')
@@ -39,4 +45,5 @@ osmosis
     })
     .log(logFunction)
     .error(errorFunction)
-    .debug(debugFunction);
+    .debug(debugFunction)
+    .done(doneFunction);