diff --git a/expat/win32/expat.iss b/expat/win32/expat.iss
index 97d5a9e..44b8199 100644
--- a/expat/win32/expat.iss
+++ b/expat/win32/expat.iss
@@ -21,6 +21,7 @@
 UninstallFilesDir={app}\Uninstall
 
 Compression=lzma/max
+SolidCompression=yes
 SourceDir=..
 OutputDir=win32
 DisableStartupPrompt=yes