diff --git a/pyproject.toml b/pyproject.toml
index e0ebf72..dd607b7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "obspec"
-version = "0.1.0-beta.4"
+version = "0.1.0-beta.5"
 description = "Object storage interface definitions for Python."
 license = "MIT"
 readme = "README.md"