diff --git a/win/banner.bmp b/win/banner.bmp
new file mode 100644
index 0000000..73e70fe
Binary files /dev/null and b/win/banner.bmp differ
diff --git a/win/dialog.bmp b/win/dialog.bmp
new file mode 100644
index 0000000..38713ca
Binary files /dev/null and b/win/dialog.bmp differ
diff --git a/win/spek.wxs b/win/spek.wxs
index 03d01ca..38576d7 100644
--- a/win/spek.wxs
+++ b/win/spek.wxs
@@ -14,6 +14,8 @@
     <UIRef Id="WixUI_InstallDir" />
     <UIRef Id="WixUI_ErrorProgressText" />
     <WixVariable Id="WixUILicenseRtf" Value="LICENSE.rtf" />
+    <WixVariable Id="WixUIBannerBmp" Value="banner.bmp" />
+    <WixVariable Id="WixUIDialogBmp" Value="dialog.bmp" />
     <Upgrade Id="$(var.UpgradeCode)">
       <UpgradeVersion Minimum="$(var.ProductVersion)" OnlyDetect="yes" Property="NEWVERSIONDETECTED" />
       <UpgradeVersion Minimum="0.0.0" IncludeMinimum="yes" Maximum="$(var.ProductVersion)" IncludeMaximum="no" Property="OLDERVERSIONBEINGUPGRADED" />