diff --git a/CHANGES b/CHANGES.rst
similarity index 100%
rename from CHANGES
rename to CHANGES.rst
diff --git a/pyproject.toml b/pyproject.toml
index 16098ed..0daa070 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -65,7 +65,7 @@ name = "sphinxcontrib.qthelp"
 
 [tool.flit.sdist]
 include = [
-    "CHANGES",
+    "CHANGES.rst",
     "LICENSE",
     # Tests
     "tests/",