diff --git a/torchstain/__init__.py b/torchstain/__init__.py
index 89f34c1..641145f 100644
--- a/torchstain/__init__.py
+++ b/torchstain/__init__.py
@@ -1 +1,3 @@
+__version__ = '1.0.0'
+
 from torchstain.normalizers.macenko_normalizer import MacenkoNormalizer