diff --git a/Cargo.toml b/Cargo.toml
index a8021cb..d9bdf46 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "grid"
-version = "0.9.0"
+version = "0.9.1-alpha.0"
 authors = ["Armin Becher <armin.becher@gmai.com>"]
 edition = "2018"
 description = "Dynamic generic 2D data structure."