diff --git a/src/components/Camera.ts b/src/components/Camera.ts
index 06b6da0..19b1424 100644
--- a/src/components/Camera.ts
+++ b/src/components/Camera.ts
@@ -1,5 +1,4 @@
-import {GPCameraCaptureType, GPCodes} from "../driver";
-import {PointerCamera, RefCamera, StructCameraText} from "../driver/modules";
+import {GPCameraCaptureType, GPCodes, PointerCamera, RefCamera, StructCameraText} from "../driver";
 import {ILiveviewOptions} from "../interfaces";
 import {CameraAbilities} from "./CameraAbilities";
 import {CameraFile} from "./CameraFile";
@@ -13,12 +12,13 @@ import {PortInfo} from "./PortInfo";
 export class Camera extends PointerWrapper<PointerCamera> {
   private initialized: boolean = false;
   private closed: boolean = false;
-  private _widgets: CameraWidgets;
 
   constructor() {
     super({method: "gp_camera", refType: RefCamera});
   }
 
+  private _widgets: CameraWidgets;
+
   get widgets(): CameraWidgets {
     this.checkNotClosed();
 
@@ -87,24 +87,6 @@ export class Camera extends PointerWrapper<PointerCamera> {
     return this;
   }
 
-  /**
-   *
-   */
-  private checkNotClosed() {
-    if (this.closed) {
-      throw new Error("Invalid state: closed");
-    }
-  }
-
-  /**
-   *
-   */
-  private checkIsInitialized() {
-    if (!this.initialized) {
-      throw new Error("Invalid state: not initialized");
-    }
-  }
-
   public liveview(options: ILiveviewOptions): Liveview {
     this.checkNotClosed();
     this.checkIsInitialized();
@@ -218,62 +200,6 @@ export class Camera extends PointerWrapper<PointerCamera> {
     return this.captureAsync(GPCameraCaptureType.GP_CAPTURE_SOUND);
   }
 
-  /**
-   *
-   * @param {GPCameraCaptureType} type
-   * @param path
-   * @returns {CameraFile | undefined}
-   */
-  protected capture(type: GPCameraCaptureType, path?: string): CameraFile | undefined {
-    this.checkNotClosed();
-    const cFilePath = new CameraFilePath();
-
-    this.call("capture", type, cFilePath.buffer, Context.get().pointer);
-
-    const cFile = cFilePath.newFile(this.pointer);
-
-    if (path && cFile) {
-      try {
-        cFile.save(path);
-      } finally {
-        this.deinitialize();
-        this.initialize();
-        cFile.closeQuietly();
-        cFilePath.close();
-      }
-    }
-
-    return cFile;
-  }
-
-  /**
-   *
-   * @param {GPCameraOperation} type
-   * @param path
-   * @returns {CameraFile | undefined}
-   */
-  protected async captureAsync(type: GPCameraCaptureType, path?: string): Promise<CameraFile | undefined> {
-    this.checkNotClosed();
-    const cFilePath = new CameraFilePath();
-
-    await this.callAsync("capture", type, cFilePath.buffer, Context.get().pointer);
-
-    const cFile = await cFilePath.newFileAsync(this.pointer);
-
-    if (path && cFile) {
-      try {
-        await cFile.saveAsync(path);
-      } finally {
-        this.deinitialize();
-        this.initialize();
-        cFile.closeQuietly();
-        cFilePath.close();
-      }
-    }
-
-    return cFile;
-  }
-
   /**
    *
    */
@@ -383,4 +309,78 @@ export class Camera extends PointerWrapper<PointerCamera> {
   toString(): string {
     return "Camera: " + this.getAbilities().model;
   }
+
+  /**
+   *
+   * @param {GPCameraCaptureType} type
+   * @param path
+   * @returns {CameraFile | undefined}
+   */
+  protected capture(type: GPCameraCaptureType, path?: string): CameraFile | undefined {
+    this.checkNotClosed();
+    const cFilePath = new CameraFilePath();
+
+    this.call("capture", type, cFilePath.buffer, Context.get().pointer);
+
+    const cFile = cFilePath.newFile(this.pointer);
+
+    if (path && cFile) {
+      try {
+        cFile.save(path);
+      } finally {
+        this.deinitialize();
+        this.initialize();
+        cFile.closeQuietly();
+        cFilePath.close();
+      }
+    }
+
+    return cFile;
+  }
+
+  /**
+   *
+   * @param {GPCameraOperation} type
+   * @param path
+   * @returns {CameraFile | undefined}
+   */
+  protected async captureAsync(type: GPCameraCaptureType, path?: string): Promise<CameraFile | undefined> {
+    this.checkNotClosed();
+    const cFilePath = new CameraFilePath();
+
+    await this.callAsync("capture", type, cFilePath.buffer, Context.get().pointer);
+
+    const cFile = await cFilePath.newFileAsync(this.pointer);
+
+    if (path && cFile) {
+      try {
+        await cFile.saveAsync(path);
+      } finally {
+        this.deinitialize();
+        this.initialize();
+        cFile.closeQuietly();
+        cFilePath.close();
+      }
+    }
+
+    return cFile;
+  }
+
+  /**
+   *
+   */
+  private checkNotClosed() {
+    if (this.closed) {
+      throw new Error("Invalid state: closed");
+    }
+  }
+
+  /**
+   *
+   */
+  private checkIsInitialized() {
+    if (!this.initialized) {
+      throw new Error("Invalid state: not initialized");
+    }
+  }
 }
diff --git a/src/driver/GPhoto2Driver.ts b/src/driver/GPhoto2Driver.ts
index d979a49..d2a1c6b 100644
--- a/src/driver/GPhoto2Driver.ts
+++ b/src/driver/GPhoto2Driver.ts
@@ -18,6 +18,7 @@ import {
 } from "./modules";
 
 const ffi = require("ffi-napi");
+const util = require("util");
 
 /**
  *
@@ -32,7 +33,7 @@ export interface GPhoto2Driver
     IGPPortInfoModule {}
 
 // tslint:disable-next-line
-export const GPhoto2Driver: GPhoto2Driver = ffi.Library("libgphoto2", {
+export const GPhoto2Driver: GPhoto2Driver & {[key: string]: any} = ffi.Library("libgphoto2", {
   // CONTEXT
   ...GPContextModuleDescription,
 
@@ -55,13 +56,6 @@ export const GPhoto2Driver: GPhoto2Driver = ffi.Library("libgphoto2", {
   ...GPWidgetModuleDescription
 });
 
-[].concat(GP_CAMERA_MODULE_ASYNC_KEYS as any, GP_FILE_MODULE_ASYNC_KEYS as any).forEach(key => {
-  // console.debug("[GPDRIVER] Bind async method", key);
-  (GPhoto2Driver as any)[key + "_async"] = function async(...args: any[]) {
-    // console.debug("[GPDRIVER] Call async method", key, args.length);
-
-    return new Promise(resolve => {
-      (GPhoto2Driver as any)[key].async(...args, resolve);
-    });
-  };
+[...GP_CAMERA_MODULE_ASYNC_KEYS, ...GP_FILE_MODULE_ASYNC_KEYS].forEach(key => {
+  GPhoto2Driver[`${key}_async`] = util.promisify(GPhoto2Driver[key].async);
 });
diff --git a/test/mocha.opts b/test/mocha.opts
index 1e2ed56..31c5dea 100644
--- a/test/mocha.opts
+++ b/test/mocha.opts
@@ -1,5 +1,4 @@
 --require ts-node/register/transpile-only
---require tsconfig-paths/register
 --require scripts/mocha/register
 --recursive
 --reporter dot