diff --git a/res/windows/wix/space-acres.wxs b/res/windows/wix/space-acres.wxs
index 344b108..a5ba1ef 100644
--- a/res/windows/wix/space-acres.wxs
+++ b/res/windows/wix/space-acres.wxs
@@ -80,7 +80,8 @@
 
         <MajorUpgrade
             Schedule='afterInstallInitialize'
-            DowngradeErrorMessage='A newer version of [ProductName] is already installed. Setup will now exit.'/>
+            DowngradeErrorMessage='A newer version of [ProductName] is already installed. Setup will now exit.'
+            AllowSameVersionUpgrades='yes'/>
 
         <Media Id='1' Cabinet='media1.cab' EmbedCab='yes' DiskPrompt='CD-ROM #1'/>
         <Property Id='DiskPrompt' Value='Space Acres Installation'/>