diff --git a/ovni.h b/ovni.h
index d19fe54..df9a7fb 100644
--- a/ovni.h
+++ b/ovni.h
@@ -50,7 +50,7 @@ typedef struct json_value_t  JSON_Value;
 
 #define OVNI_STREAM_MAGIC "ovni"
 #define OVNI_STREAM_VERSION 1
-#define OVNI_MODEL_VERSION "O1 V1 T1 M1 D1 K1"
+#define OVNI_MODEL_VERSION "O1 V1 T1 M1 D1 K1 61"
 
 /* ----------------------- common ------------------------ */