diff --git a/inesdata_mov_datasets/__init__.py b/inesdata_mov_datasets/__init__.py
index 171a445..c0f7a48 100644
--- a/inesdata_mov_datasets/__init__.py
+++ b/inesdata_mov_datasets/__init__.py
@@ -1 +1 @@
-__version__: str = "0.3.0.dev"
+__version__: str = "0.4.0.dev"