diff --git a/packages/mindplot/package.json b/packages/mindplot/package.json
index b12fb861..137b8e7a 100644
--- a/packages/mindplot/package.json
+++ b/packages/mindplot/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@wisemapping/mindplot",
-    "version": "0.4.12",
+    "version": "0.4.13",
     "description": "WiseMapping - Mindplot Canvas Library",
     "homepage": "http://www.wisemapping.org/",
     "main": "dist/main.js",
diff --git a/packages/mindplot/src/components/Workspace.ts b/packages/mindplot/src/components/Workspace.ts
index a5facdbe..a5c325c7 100644
--- a/packages/mindplot/src/components/Workspace.ts
+++ b/packages/mindplot/src/components/Workspace.ts
@@ -27,7 +27,7 @@ class Workspace {
   _containerSize: Size;
   _workspace: Workspace2D;
   _eventsEnabled: boolean;
-  private _visibleAreaSize: any;
+  private _visibleAreaSize: Size;
 
   constructor(screenManager: ScreenManager, zoom: number, isReadOnly: boolean) {
     // Create a suitable container ...