diff --git a/appveyor.yml b/appveyor.yml
index 40fe010c8..e4c5010cb 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -4,7 +4,7 @@
 # Copyright (c) 2016-2017 ITER Organization
 
 # Version format
-version: base-{branch}.{build}
+version: base-{branch}-{build}
 
 #---------------------------------#
 #       repository cloning        #