diff --git a/src/meds/schema.py b/src/meds/schema.py
index 8e2c645..edbc9e1 100644
--- a/src/meds/schema.py
+++ b/src/meds/schema.py
@@ -129,5 +129,6 @@ def patient_schema(per_event_properties_schema=pa.null()):
         "etl_name": NotRequired[str],
         "etl_version": NotRequired[str],
         "code_metadata": NotRequired[CodeMetadata],
+        "meds_version": NotRequired[str],
     },
 )