diff --git a/d.ts/antos.d.ts b/d.ts/antos.d.ts
index 1e58d79..edf1238 100644
--- a/d.ts/antos.d.ts
+++ b/d.ts/antos.d.ts
@@ -8237,6 +8237,18 @@ declare namespace OS {
                  * @memberof WindowTag
                  */
                 constructor();
+                /**
+                 * blur overlay: If active the window overlay will be shown
+                 * on inactive (blur event)
+                 *
+                 * Setter: Enable the switch
+                 *
+                 * Getter: Check whether the switch is enabled
+                 *
+                 * @memberof WindowTag
+                 */
+                set blur_overlay(v: boolean);
+                get blur_overlay(): boolean;
                 /**
                  * Init window tag
                  * - `shown`: false
diff --git a/release/antos-1.2.1.tar.gz b/release/antos-1.2.1.tar.gz
index 615a724..5179279 100644
Binary files a/release/antos-1.2.1.tar.gz and b/release/antos-1.2.1.tar.gz differ
diff --git a/src/core/tags/WindowTag.ts b/src/core/tags/WindowTag.ts
index b49ba17..22debe5 100644
--- a/src/core/tags/WindowTag.ts
+++ b/src/core/tags/WindowTag.ts
@@ -80,6 +80,23 @@ namespace OS {
                     super();
                 }
 
+                /**
+                 * blur overlay: If active the window overlay will be shown
+                 * on inactive (blur event)
+                 * 
+                 * Setter: Enable the switch
+                 *
+                 * Getter: Check whether the switch is enabled
+                 *
+                 * @memberof WindowTag
+                 */
+                set blur_overlay(v: boolean) {
+                    this.attsw(v, "blur-overlay");
+                }
+                get blur_overlay(): boolean {
+                    return this.hasattr("blur-overlay");
+                }
+
                 /**
                  * Init window tag
                  * - `shown`: false
@@ -296,7 +313,8 @@ namespace OS {
                     this.observable.on("blur", () => {
                         this._shown = false;
                         $(this).addClass("unactive");
-                        $(this.refs.win_overlay).show();
+                        if(this.blur_overlay)
+                            $(this.refs.win_overlay).show();
                     });
                     this.observable.on("hide", () => {
                         $(this).hide();