diff --git a/blenderpack.py b/blenderpack.py
index 1972a3b..800da1c 100755
--- a/blenderpack.py
+++ b/blenderpack.py
@@ -14,7 +14,7 @@ import logging
 
 log = logging.getLogger(__name__)
 
-REQUIRED_KEYS = set(['name', 'blender'])
+REQUIRED_KEYS = set(['name', 'blender', 'version'])
 SCHEMA_VERSION = 1
 
 def report(msg):