diff --git a/src/envelope_authorizer/__init__.py b/src/envelope_authorizer/__init__.py
index f1380ee..5ee9ebf 100644
--- a/src/envelope_authorizer/__init__.py
+++ b/src/envelope_authorizer/__init__.py
@@ -1 +1,6 @@
-__version__ = "0.1.7"
+from importlib.metadata import version, PackageNotFoundError
+
+try:
+    __version__ = version("envelope_authorizer")
+except PackageNotFoundError:
+    __version__ = "0.0.0+unknown"