diff --git a/dataretrieval/py.typed b/dataretrieval/py.typed
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/dataretrieval/py.typed
@@ -0,0 +1 @@
+
diff --git a/pyproject.toml b/pyproject.toml
index e55dc81..692a01e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,6 +27,9 @@ dynamic = ["version"]
 [tool.setuptools]
 packages = ["dataretrieval", "dataretrieval.codes"]
 
+[tool.setuptools.package-data]
+dataretrieval = ["py.typed"]
+
 [project.optional-dependencies]
 test = [
   "pytest > 5.0.0",
diff --git a/setup.py b/setup.py
index 6068493..fc1f76c 100644
--- a/setup.py
+++ b/setup.py
@@ -1,3 +1,3 @@
 from setuptools import setup
 
-setup()
+setup()
\ No newline at end of file