diff --git a/beta_spectrum/__init__.py b/beta_spectrum/__init__.py
index 6cf8e38..439eb56 100644
--- a/beta_spectrum/__init__.py
+++ b/beta_spectrum/__init__.py
@@ -52,4 +52,4 @@ __all__ = [
     "DEFAULT_JSON_SCHEMA",
 ]
 
-__version__ = "0.3.0"
+__version__ = "0.4.0"