diff --git a/types/serverless/classes/PluginManager.d.ts b/types/serverless/classes/PluginManager.d.ts
index 95e01f721a..76f3479c84 100644
--- a/types/serverless/classes/PluginManager.d.ts
+++ b/types/serverless/classes/PluginManager.d.ts
@@ -14,6 +14,7 @@ declare class PluginManager {
     loadServicePlugins(servicePlugins: {}): void;
     loadCommand(pluginName: string, details: {}, key: string): {};
     loadCommands(pluginInstance: Plugin): void;
+    spawn(commandsArray: string | string[], options?: any): Promise<void>;
 
     cliOptions: {};
     cliCommands: {};
diff --git a/types/serverless/classes/Service.d.ts b/types/serverless/classes/Service.d.ts
index 2f05f3b7c0..040a45f825 100644
--- a/types/serverless/classes/Service.d.ts
+++ b/types/serverless/classes/Service.d.ts
@@ -15,6 +15,11 @@ declare class Service {
       };
 
       name: string;
+      stage: string;
+      region: string;
+      runtime?: string;
+      timeout?: number;
+      versionFunctions: boolean;
     };
     constructor(serverless: Serverless, data: {});
 
diff --git a/types/serverless/index.d.ts b/types/serverless/index.d.ts
index 01f9d7a73e..d720ec2382 100644
--- a/types/serverless/index.d.ts
+++ b/types/serverless/index.d.ts
@@ -1,6 +1,7 @@
 // Type definitions for serverless 1.18
 // Project: https://github.com/serverless/serverless#readme
 // Definitions by: Hassan Khan <https://github.com/hassankhan>
+//                 Jonathan M. Wilbur <https://github.com/JonathanWilbur>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 import Service = require("./classes/Service");
@@ -12,6 +13,9 @@ import AwsProvider = require("./plugins/aws/provider/awsProvider");
 
 declare namespace Serverless {
     interface Options {
+        function?: string;
+        watch?: boolean;
+        extraServicePath?: string;
         stage: string | null;
         region: string | null;
         noDeploy?: boolean;
@@ -23,11 +27,24 @@ declare namespace Serverless {
 
     interface FunctionDefinition {
         name: string;
+        package: Package;
+        runtime?: string;
+        handler: string;
+        timeout?: number;
+        memorySize?: number;
+        environment?: { [ name: string ]: string };
     }
 
     interface Event {
         eventName: string;
     }
+
+    interface Package {
+        include: string[];
+        exclude: string[];
+        artifact?: string;
+        individually?: boolean;
+    }
 }
 
 declare class Serverless {