diff --git a/setup.cfg b/setup.cfg
index 41bd74a..1d98deb 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -3,7 +3,7 @@
 
 [bdist_wheel]
 # Use this option if your package is pure-python
-universal =
+universal = 1
 
 [versioneer]
 VCS = git