diff --git a/.changes/fix-windows-downgrades.md b/.changes/fix-windows-downgrades.md
new file mode 100644
index 000000000..c09942302
--- /dev/null
+++ b/.changes/fix-windows-downgrades.md
@@ -0,0 +1,5 @@
+---
+"tauri-bundler": patch
+---
+
+Fix app downgrades when using the Windows installer.
diff --git a/tooling/bundler/src/bundle/windows/templates/main.wxs b/tooling/bundler/src/bundle/windows/templates/main.wxs
index f6eea5204..3c0f76c9a 100644
--- a/tooling/bundler/src/bundle/windows/templates/main.wxs
+++ b/tooling/bundler/src/bundle/windows/templates/main.wxs
@@ -25,8 +25,12 @@
                  InstallScope="perMachine"
                  SummaryCodepage="!(loc.TauriCodepage)"/>
 
+        <!-- https://docs.microsoft.com/en-us/windows/win32/msi/reinstallmode -->
+        <!-- force all files to be reinstalled; rewrite all registry entries; reinstall all shortcuts -->
+        <Property Id="REINSTALLMODE" Value="amus" />
+
         {{#if allow_downgrades}}
-            <MajorUpgrade AllowDowngrades="yes" />
+            <MajorUpgrade AllowDowngrades="yes" Schedule="afterInstallInitialize" />
         {{else}}
             <MajorUpgrade DowngradeErrorMessage="!(loc.DowngradeErrorMessage)" AllowSameVersionUpgrades="yes" />
         {{/if}}