diff --git a/mono-core.spec b/mono-core.spec
index 4a8769cb70..e41b6c89c1 100644
--- a/mono-core.spec
+++ b/mono-core.spec
@@ -29,8 +29,8 @@
 %define sgen yes
 
 Name:           mono-core
-%define __majorver 5.13.0
-%define __minorver 623
+%define __majorver 5.15.0
+%define __minorver 0
 Version:	%{__majorver}.%{__minorver}
 Release:	0.nightly.1
 Summary:        Cross-platform, Open Source, .NET development framework