diff --git a/src/cholupdates/__init__.py b/src/cholupdates/__init__.py
index 3b803a9..4e5c55c 100644
--- a/src/cholupdates/__init__.py
+++ b/src/cholupdates/__init__.py
@@ -2,4 +2,4 @@
 factorization of low-rank up-/downdates to a matrix with a known Cholesky factorization.
 """
 
-__version__ = "0.0.1"
+__version__ = "0.0.1-alpha"