diff --git a/VERSION b/VERSION
index 686acf2f4..51ad0a34c 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.1-dev
+5.0-dev
diff --git a/spec/Vehicle/Vehicle.vspec b/spec/Vehicle/Vehicle.vspec
index f9f6c691f..1150e22ea 100644
--- a/spec/Vehicle/Vehicle.vspec
+++ b/spec/Vehicle/Vehicle.vspec
@@ -23,13 +23,13 @@ VersionVSS:
 VersionVSS.Major:
   datatype: uint32
   type: attribute
-  default: 4
+  default: 5
   description: Supported Version of VSS - Major version.
 
 VersionVSS.Minor:
   datatype: uint32
   type: attribute
-  default: 1
+  default: 0
   description: Supported Version of VSS - Minor version.
 
 VersionVSS.Patch: