diff --git a/loaih/__init__.py b/loaih/__init__.py
index 32643cc..ecd087c 100644
--- a/loaih/__init__.py
+++ b/loaih/__init__.py
@@ -167,7 +167,7 @@ class Build(object):
         # At this point, let's decompress the deb packages
         subprocess.run("find .. -iname '*.deb' -exec dpkg -x {} . \;", shell=True, cwd=self.appimagedir)
         if self.portable:
-            shortversion = self.version.split('.')[0-2].join('.')
+            shortversion = str.join('.', self.version.split('.')[:3])
             subprocess.run("find . -type f -iname 'bootstraprc' -exec sed -i 's|^UserInstallation=.*|UserInstallation=\$SYSUSERCONFIG/libreoffice/{version}|g' {} \+".format(version = shortversion), shell=True, cwd=self.appimagedir)
 
         # Changing desktop file