diff --git a/build/scripts/Versioning.fs b/build/scripts/Versioning.fs
index 4b27be2287..a3b9d7f2c0 100644
--- a/build/scripts/Versioning.fs
+++ b/build/scripts/Versioning.fs
@@ -17,7 +17,7 @@ module Versioning =
     // Since that file is now generated by the dotnet tooling and GitVersion and similar tooling all still have
     // active issues related to dotnet core, we now just burn this info in global.json
     
-    let parse (v:string) = SemVer.parse(v)
+    let parse (v: string) = SemVer.parse(if String.IsNullOrEmpty(v) then "1.0.0" else v)
 
     //Versions in form of e.g 6.1.0 is inferred as datetime so we bake the json shape into the provider like this
     type SdkVersion = { version:string; rollForward:string; allowPrerelease:bool }
diff --git a/src/Elastic.Clients.Elasticsearch/_Shared/Core/EnumValueParser.cs b/src/Elastic.Clients.Elasticsearch/_Shared/Core/EnumValueParser.cs
index df936fbc2d..0e5e1a821e 100644
--- a/src/Elastic.Clients.Elasticsearch/_Shared/Core/EnumValueParser.cs
+++ b/src/Elastic.Clients.Elasticsearch/_Shared/Core/EnumValueParser.cs
@@ -1,3 +1,7 @@
+// Licensed to Elasticsearch B.V under one or more agreements.
+// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information.
+
 #if !NET5_0_OR_GREATER
 using System.Linq;
 #endif