diff --git a/pyproject.toml b/pyproject.toml
index 112ac61..6c00033 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "polyomino"
-version = "0.7.0"
+version = "0.8.0a0"
 description = "Solve polyomino tiling problems."
 readme = "README.md"
 authors = ["Jack Grahl <jack.grahl@gmail.com>"]