diff --git a/src/tzst/__init__.py b/src/tzst/__init__.py
index 036fab4..a04a123 100644
--- a/src/tzst/__init__.py
+++ b/src/tzst/__init__.py
@@ -1,6 +1,6 @@
 """tzst - A Python library for creating and manipulating .tzst/.tar.zst archives."""
 
-__version__ = "0.4.0"
+__version__ = "1.0.0"
 
 from .core import (
     TzstArchive,