diff --git a/.github/workflows/csharp-tests.yml b/.github/workflows/csharp-tests.yml
index f660fb7..bfa8204 100644
--- a/.github/workflows/csharp-tests.yml
+++ b/.github/workflows/csharp-tests.yml
@@ -11,7 +11,7 @@ on:
     branches:
       - main
 env:
-  binding_build_number_based_version: 0.3.1.${{ github.run_number }}
+  binding_build_number_based_version: 0.4.0.${{ github.run_number }}
 
 jobs:
   build-ckzg: