diff --git a/cookiecutter.json b/cookiecutter.json
index 6b49e4dd9..9f79e8d76 100644
--- a/cookiecutter.json
+++ b/cookiecutter.json
@@ -1,6 +1,6 @@
 {
     "project_name": "project_name",
-    "project_slug": "{{ cookiecutter.project_name|replace(' ', '_')|replace('-', '_') }}",
+    "project_slug": "{{ cookiecutter.project_name.lower()|replace(' ', '_')|replace('-', '_') }}",
     "author_name": "Your Name",
     "email": "Your email",
     "description": "A short description of the project.",