diff --git a/firmware/include/version.h b/firmware/include/version.h
index 7f5f213..9047afe 100644
--- a/firmware/include/version.h
+++ b/firmware/include/version.h
@@ -1,2 +1,3 @@
 #pragma once
+// Format: MAJOR.MINOR.PATCH (SemVer) — OTA version compare uses sscanf("%d.%d.%d")
 #define FW_VERSION "1.0.0"