diff --git a/pyproject.toml b/pyproject.toml
index 5c03c2e..41c1be2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -49,5 +49,8 @@ Issues = "https://github.com/ai-christianson/ra-aid/issues"
 [tool.setuptools.dynamic]
 version = {attr = "ra_aid.version.__version__"}
 
+[tool.hatch.version]
+path = "ra_aid/__version__.py"
+
 [tool.hatch.build.targets.wheel]
 packages = ["ra_aid"]
diff --git a/ra_aid/__version__.py b/ra_aid/__version__.py
new file mode 100644
index 0000000..e58a6ce
--- /dev/null
+++ b/ra_aid/__version__.py
@@ -0,0 +1,3 @@
+"""Version information."""
+
+__version__ = "0.1.0"