diff --git a/misc/windows/update_version.sh b/misc/windows/update_version.sh
index 1c72ef2..0ffe6d4 100755
--- a/misc/windows/update_version.sh
+++ b/misc/windows/update_version.sh
@@ -1,12 +1,13 @@
 #!/bin/bash
 
+TIMESTAMP=`date +%Y%m%d.%H%M%S`
 VERSIONMAJOR=`grep '<version>' pom.xml | head -1 | sed -e 's/^.*<version>//g' -e 's/\..*$//g'`
 VERSIONMINOR=`grep '<version>' pom.xml | head -1 | sed -E 's/^.*<version>[0-9]+?\.//g' | sed -E -e 's/(\..*|-SNAPSHOT|)<\/version>.*$//g'`
 sed -z -i -e "s/!define\ VERSIONMAJOR\ [0-9]/!define\ VERSIONMAJOR $VERSIONMAJOR\ /" misc/windows/NSIS/installer.nsi
 sed -z -i -e "s/!define\ VERSIONMINOR\ [0-9]/!define\ VERSIONMINOR $VERSIONMINOR\ /" misc/windows/NSIS/installer.nsi
 if [ $# -eq 0 ]
   then
-    sed -z -i -e "s/OutFile\ \"Installer.exe\"/OutFile\ \"Installer-$VERSIONMAJOR.$VERSIONMINOR.exe\"\ /" misc/windows/NSIS/installer.nsi
+    sed -z -i -e "s/OutFile\ \"Installer.exe\"/OutFile\ \"Installer-$VERSIONMAJOR.$VERSIONMINOR-$TIMESTAMP.exe\"\ /" misc/windows/NSIS/installer.nsi
   else
-    sed -z -i -e "s/OutFile\ \"Installer.exe\"/OutFile\ \"Installer-legacy-$VERSIONMAJOR.$VERSIONMINOR.exe\"\ /" misc/windows/NSIS/installer.nsi
+    sed -z -i -e "s/OutFile\ \"Installer-$VERSIONMAJOR.$VERSIONMINOR-[0-9]*\.[0-9]*.exe\"/OutFile\ \"Installer-legacy-$VERSIONMAJOR.$VERSIONMINOR-$TIMESTAMP.exe\"\ /" misc/windows/NSIS/installer.nsi
 fi