diff --git a/pyproject.toml b/pyproject.toml
index 7cfe8ab..1a45052 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "alchemical"
-version = "1.0.1"
+version = "1.0.2.dev0"
 authors = [
     { name = "Miguel Grinberg", email = "miguel.grinberg@gmail.com" },
 ]