diff --git a/abcattrs/__init__.py b/abcattrs/__init__.py
index 549f933..ad2b32e 100644
--- a/abcattrs/__init__.py
+++ b/abcattrs/__init__.py
@@ -9,4 +9,4 @@
     "abstractattrs",
     "check_abstract_class_attributes",
 )
-__version__ = "0.3.2"
+__version__ = "0.4.0"