diff --git a/HISTORY.rst b/HISTORY.rst
index 6f575ad..de28234 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -3,6 +3,12 @@
 History
 -------
 
+2.4.1
+++++++++++++++++++
+
+* Previously, the ``py.typed`` file was not being added to the source
+  distribution. It is now explicitly specified in the manifest.
+
 2.4.0 (2021-08-26)
 ++++++++++++++++++
 
diff --git a/MANIFEST.in b/MANIFEST.in
index 11949a5..e822f56 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,4 +1,4 @@
-include HISTORY.rst README.rst LICENSE
+include HISTORY.rst README.rst LICENSE minfraud/py.typed
 recursive-include tests *
 recursive-include docs *
 recursive-exclude docs *.pyc