diff --git a/pyproject.toml b/pyproject.toml
index 54c6791..6ef50b5 100755
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "cotengrust"
-version = "0.1.1.dev0"
+version = "0.1.1-dev0"
 description = "Fast contraction ordering primitives for tensor networks."
 requires-python = ">=3.8"
 classifiers = [