diff --git a/tools/marvin/setup.py b/tools/marvin/setup.py
index 1ceff3dc204..f01863d6989 100644
--- a/tools/marvin/setup.py
+++ b/tools/marvin/setup.py
@@ -27,7 +27,7 @@ except ImportError:
         raise RuntimeError("python setuptools is required to build Marvin")
 
 
-VERSION = "4.20.3.0"
+VERSION = "4.20.3.0-SNAPSHOT"
 
 setup(name="Marvin",
       version=VERSION,