diff --git a/magic_spoiler/__main__.py b/magic_spoiler/__main__.py
index 3f42ee56..7abaa36d 100644
--- a/magic_spoiler/__main__.py
+++ b/magic_spoiler/__main__.py
@@ -199,8 +199,7 @@ def open_header(card_xml_file: IO[Any]) -> None:
         + "<author>Cockatrice/Magic-Spoiler</author>\n"
         + "<createdAt>" + datetime.datetime.utcnow().strftime("%Y-%m-%d %H:%M:%S") + " (UTC)" + "</createdAt>\n"
         + "<sourceUrl>https://github.com/Cockatrice/Magic-Spoiler/blob/files/spoiler.xml</sourceUrl>\n"
-        #TODO, version schema
-        + "<sourceVersion>???</sourceVersion>\n"
+        + "<sourceVersion>" + datetime.datetime.utcnow().strftime("%Y%m%d") + "</sourceVersion>\n"
         + "</info>\n"
         + "<sets>\n"
     )