diff --git a/mono-core.spec b/mono-core.spec
index 519a971d15..beb4846d31 100644
--- a/mono-core.spec
+++ b/mono-core.spec
@@ -27,10 +27,10 @@
 %define sgen yes
 
 Name:           mono-core
-%define __majorver 4.1.0
-%define __minorver 1738
+%define __majorver 4.3.0
+%define __minorver 10
 Version:	%{__majorver}.%{__minorver}
-Release:	0.nightly.5
+Release:	0.xamarin.1
 Summary:        Cross-platform, Open Source, .NET development framework
 License:        LGPL-2.1 and MIT and MS-PL
 Group:          Development/Languages/Mono