diff --git a/pyproject.toml b/pyproject.toml
index 1baf6c3eb224f77643dac476dab95784dea1043a..856c60eb4b823a1257c9b949a9ec70db6e118ee8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@
 
 [project]
 name = "clapper"
-version = "1.0.1b0"
+version = "1.0.0b0"
 requires-python = ">=3.9"
 description = "Configuration Support for Python Packages and CLIs"
 readme = "README.md"