diff --git a/src/datumaro/version.py b/src/datumaro/version.py
index 0f228f2586..5fc8250c21 100644
--- a/src/datumaro/version.py
+++ b/src/datumaro/version.py
@@ -1 +1 @@
-__version__ = "1.5.1"
+__version__ = "1.5.1rc4"