diff --git a/MANIFEST.in b/MANIFEST.in
new file mode 100644
index 0000000..f7ab88f
--- /dev/null
+++ b/MANIFEST.in
@@ -0,0 +1 @@
+graft src/htmp/data
diff --git a/pyproject.toml b/pyproject.toml
index d66f0df..17f5c1b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,7 +17,7 @@ namespaces = true
 # ----------------------------------------- Project Metadata -------------------------------------
 #
 [project]
-version = "0.0.0.dev3"
+version = "0.0.0.dev4"
 name = "HTMP"
 requires-python = ">=3.10"
 dependencies = [