diff --git a/DESCRIPTION.txt b/DESCRIPTION.rst
similarity index 100%
rename from DESCRIPTION.txt
rename to DESCRIPTION.rst
diff --git a/pyproject.toml b/pyproject.toml
index 35da990312..1fa27d77ec 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,7 +17,7 @@ authors = [
     {name = "pymc-devs", email = "pymc.devs@gmail.com"}
 ]
 description = "Optimizing compiler for evaluating mathematical expressions on CPUs and GPUs."
-readme = "DESCRIPTION.txt"
+readme = "DESCRIPTION.rst"
 license = {file = "LICENCE.txt"}
 classifiers = [
     "Development Status :: 6 - Mature",