diff --git a/pyproject.toml b/pyproject.toml
index 137f713d9703c353c45b3d4659041712094546f5..5ce5d24a89a8103e8e1c12467101656a57466fd1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pycgtool"
-version = "2.0.0-alpha.5"
+version = "2.0.0-alpha.6"
 description = "Generate coarse-grained molecular dynamics models from atomistic trajectories."
 authors = ["James Graham <j.graham@soton.ac.uk>"]
 license = "GPL-3.0-only"