diff --git a/pyproject.toml b/pyproject.toml
index 529ade9..f4bdb1a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,3 +57,4 @@ Homepage = "https://rbinvariantslib.readthedocs.io/en/latest/"
 [tool.setuptools_scm]
 version_scheme = "post-release"
 local_scheme = "node-and-date"
+write_to = "rbinvariants/_version.py"
diff --git a/rbinvariantslib/__init__.py b/rbinvariantslib/__init__.py
index 8b13789..53fda93 100644
--- a/rbinvariantslib/__init__.py
+++ b/rbinvariantslib/__init__.py
@@ -1 +1,7 @@
 
+try:
+    from ._version import __version__
+    from ._version import version_tuple
+except ImportError:
+    __version__ = "unknown"
+    version_tuple = (0, 0, "unknown version")