diff --git a/scripts/_ensure_packages_have_version.py b/scripts/_ensure_packages_have_version.py
index a0e21336..c22c2d86 100644
--- a/scripts/_ensure_packages_have_version.py
+++ b/scripts/_ensure_packages_have_version.py
@@ -1,6 +1,6 @@
 
 def ensure_packages_have_version(theme_data):
-    if 'version' not in theme_data:
+    if theme_data.get('version', None) is None:
         print("  Version is required in theme.json. Adding default value of 1.0.0.")
         theme_data['version'] = '1.0.0'
-    return theme_data
\ No newline at end of file
+    return theme_data