diff --git a/types/chrome/chrome-app.d.ts b/types/chrome/chrome-app.d.ts
index f80b335125..5c847325e0 100644
--- a/types/chrome/chrome-app.d.ts
+++ b/types/chrome/chrome-app.d.ts
@@ -1,6 +1,6 @@
 // Type definitions for Chrome packaged application development
 // Project: http://developer.chrome.com/apps/
-// Definitions by: Adam Lay <https://github.com/AdamLay>, MIZUNE Pine <https://github.com/pine613>, MIZUSHIMA Junki <https://github.com/mzsm>, Ingvar Stepanyan <https://github.com/RReverser>
+// Definitions by: Adam Lay <https://github.com/AdamLay>, MIZUNE Pine <https://github.com/pine613>, MIZUSHIMA Junki <https://github.com/mzsm>, Ingvar Stepanyan <https://github.com/RReverser>, Adam Pyle <https://github.com/pyle>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 /// <reference path="index.d.ts"/>
@@ -21,12 +21,38 @@ declare namespace chrome.app {
 // App Runtime
 ////////////////////
 declare namespace chrome.app.runtime {
+    enum LaunchSource {
+        "untracked" = "untracked",
+        "app_launcher" = "app_launcher",
+        "new_tab_page" = "new_tab_page",
+        "reload" = "reload",
+        "restart" = "restart",
+        "load_and_launch" = "load_and_launch",
+        "command_line" = "command_line",
+        "file_handler" = "file_handler",
+        "url_handler" = "url_handler",
+        "system_tray" = "system_tray",
+        "about_page" = "about_page",
+        "keyboard" = "keyboard",
+        "extensions_page" = "extensions_page",
+        "management_api" = "management_api",
+        "ephemeral_app" = "ephemeral_app",
+        "background" = "background",
+        "kiosk" = "kiosk",
+        "chrome_internal" = "chrome_internal",
+        "test" = "test",
+        "installed_notification" = "installed_notification",
+        "context_menu" = "context_menu",
+    }
     interface LaunchData {
         id?: string;
         items?: LaunchDataItem[];
         url?: string;
         referrerUrl?: string;
         isKioskSession?: boolean;
+        isPublicSession?: boolean;
+        source?: LaunchSource;
+        actionData?: {};
     }
 
     interface LaunchDataItem {
diff --git a/types/chrome/index.d.ts b/types/chrome/index.d.ts
index bb2b4afcb5..16ed80730f 100644
--- a/types/chrome/index.d.ts
+++ b/types/chrome/index.d.ts
@@ -2,7 +2,7 @@
 // Project: http://developer.chrome.com/extensions/
 // Definitions by: Matthew Kimber <https://github.com/matthewkimber>, otiai10 <https://github.com/otiai10>, couven92 <https://github.com/couven92>, RReverser <https://github.com/rreverser>, sreimer15 <https://github.com/sreimer15>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 2.3
+// TypeScript Version: 2.4
 
 /// <reference types="filesystem" />