diff --git a/debian/changelog b/debian/changelog
index a4c4cea2..b5079fdf 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,8 @@
+nymea (0.13.0) UNRELEASED; urgency=medium
+
+
+ -- Michael Zanetti <michael.zanetti@guh.io>  Fri, 10 May 2019 12:18:54 +0200
+
 nymea (0.12.1) xenial; urgency=medium
 
   [ Michael Zanetti ]
diff --git a/nymea.pri b/nymea.pri
index 3a1a78eb..914914a5 100644
--- a/nymea.pri
+++ b/nymea.pri
@@ -3,7 +3,7 @@ NYMEA_VERSION_STRING=$$system('dpkg-parsechangelog | sed -n -e "s/^Version: //p"
 
 # define protocol versions
 JSON_PROTOCOL_VERSION_MAJOR=2
-JSON_PROTOCOL_VERSION_MINOR=0
+JSON_PROTOCOL_VERSION_MINOR=1
 REST_API_VERSION=1
 
 COPYRIGHT_YEAR_FROM=2013