diff --git a/schemas/community_submission.v1.schema.json b/schemas/community_submission.v1.schema.json
index 18609a4..16527fb 100644
--- a/schemas/community_submission.v1.schema.json
+++ b/schemas/community_submission.v1.schema.json
@@ -11,7 +11,7 @@
     },
     "transponder_code_hex": {
       "type": "string",
-      "pattern": "^[0-9A-Fa-f]{6}$"
+      "pattern": "^[0-9A-F]{6}$"
     },
     "planequery_airframe_id": {
       "type": "string",