diff --git a/setup.py b/setup.py
index 189de09c4..d9ddc5af8 100755
--- a/setup.py
+++ b/setup.py
@@ -429,6 +429,8 @@ try:
     args['options'] = {
         'bdist_nsis': {
             'includes': ['sip'] + [e.name for e in ext_modules],
+            'excludes': ['ssl', 'socket', 'bz2'],
+            'optimize': 2,
         },
     }
 except ImportError: