diff --git a/composeApp/build.gradle.kts b/composeApp/build.gradle.kts
index 0f8a5df..8bac424 100644
--- a/composeApp/build.gradle.kts
+++ b/composeApp/build.gradle.kts
@@ -195,7 +195,7 @@ compose.desktop {
             modules("java.sql", "java.naming") // java.naming is required by logback
 
             packageName = "Bankmeister"
-            packageVersion = "1.0.0"
+            packageVersion = "1.0.0" // minor version < 1 (DMG) and dashes as in '1.0.0-Alpha-14' (RPM) are not allowed
             description = "Datenschutzfreundliche Multi-Banking App für die meisten deutschen Banken"
             copyright = "© 2024 codinux GmbH & Co.KG. All rights reserved."
             vendor = "codinux GmbH & Co.KG"
@@ -207,6 +207,13 @@ compose.desktop {
                 iconFile = project.file("../docs/res/AppIcons/distributions/AppIcon.icns")
             }
             windows {
+                // a unique ID, which enables users to update an app via installer, when an updated version is newer, than an installed version.
+                // The value must remain constant for a single application. See [the link](https://wixtoolset.org/documentation/manual/v3/howtos/general/generate_guids.html) for details on generating a UUID.
+                upgradeUuid = "F62896E2-382E-4311-9683-1AB3AA4EB9E7"
+
+                menu = true
+                msiPackageVersion = "0.9.0"
+
                 iconFile = project.file("../docs/res/AppIcons/distributions/AppIcon.ico")
             }
             linux {
diff --git a/docs/res/AppIcons/distributions/AppIcon.ico b/docs/res/AppIcons/distributions/AppIcon.ico
index 4352813..c2a5c53 100644
Binary files a/docs/res/AppIcons/distributions/AppIcon.ico and b/docs/res/AppIcons/distributions/AppIcon.ico differ