diff --git a/package-lock.json b/package-lock.json
index 6c4c642..ac8fb58 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "botlib",
-  "version": "1.4.4",
+  "version": "1.5.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 206a5ae..2d9809d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "botlib",
-  "version": "1.4.4",
+  "version": "1.5.0",
   "description": "General Bot base library for building Node.js TypeScript Apps packages (.gbapp) and Libray packages (.gblib)",
   "main": "dist/index.js",
   "types": "dist/index",
@@ -9,7 +9,8 @@
     "Rodrigo Rodriguez <me@rodrigorodriguez.com>",
     "João Antonio Ferreira <joao.parana@gmail.com>",
     "Jorge Ramos <jramos@pobox.com>",
-    "PH <ph.an@outlook.com>"
+    "PH <ph.an@outlook.com>",
+    "Dário Vieira <dario.junior3@gmail.com>"
   ],
   "license": "AGPL-3.0",
   "repository": {
diff --git a/src/IGBCoreService.ts b/src/IGBCoreService.ts
index f8507e1..17d47f4 100644
--- a/src/IGBCoreService.ts
+++ b/src/IGBCoreService.ts
@@ -35,6 +35,7 @@
 import { Sequelize } from "sequelize-typescript"
 import { IGBInstance } from "./IGBInstance"
 import { IGBInstallationDeployer } from "./IGBInstallationDeployer";
+import { IGBPackage } from "./IGBPackage";
 
 /**
  * This interface defines the core service which is shared among
@@ -50,7 +51,7 @@ export interface IGBCoreService {
     initStorage(): Promise<any>;
     createBootInstance(core: IGBCoreService, installationDeployer: IGBInstallationDeployer, proxyAddress: string);
     ensureAdminIsSecured();
-    loadSysPackages(core: IGBCoreService);
+    loadSysPackages(core: IGBCoreService): Promise<IGBPackage[]>;
     ensureProxy(port): Promise<string>;
     ensureInstances(instances: IGBInstance[], bootInstance: any, core: IGBCoreService);
     checkStorage(azureDeployer: IGBInstallationDeployer);
diff --git a/src/IGBPackage.ts b/src/IGBPackage.ts
index 46e3264..b45a4d4 100644
--- a/src/IGBPackage.ts
+++ b/src/IGBPackage.ts
@@ -48,30 +48,30 @@ export interface IGBPackage{
     /** 
      * Called when a package is being loaded, once per server or at demand. 
      */
-    loadPackage(core: IGBCoreService, sequelize: Sequelize): void
+    loadPackage(core: IGBCoreService, sequelize: Sequelize): Promise<void>
 
     /** 
      * Called when a package needs to be unloaded. 
      */
-    unloadPackage(core: IGBCoreService): void
+    unloadPackage(core: IGBCoreService): Promise<void>
 
    /** 
      * Called when a new bot instance is loaded. 
      */
-    getDialogs(min: GBMinInstance) 
+    getDialogs(min: GBMinInstance)
 
     /** 
      * Called when a new bot instance is loaded. 
      */
-    loadBot(min: GBMinInstance): void
+    loadBot(min: GBMinInstance): Promise<void>
 
     /** 
      * Called whenever a bot instance needs to be shutdown.
      */
-    unloadBot(min: GBMinInstance): void
+    unloadBot(min: GBMinInstance): Promise<void>
 
     /**
      * Called in each new session. 
      */
-    onNewSession(min: GBMinInstance, step: GBDialogStep): void
+    onNewSession(min: GBMinInstance, step: GBDialogStep): Promise<void>
 }
\ No newline at end of file