diff --git a/CONTRIBUTORS.rst b/CONTRIBUTORS.rst
index 35508eb76..b64828956 100644
--- a/CONTRIBUTORS.rst
+++ b/CONTRIBUTORS.rst
@@ -144,6 +144,7 @@ Listed in alphabetical order.
   Pablo                    `@oubiga`_
   Parbhat Puri             `@parbhat`_
   Peter Bittner            `@bittner`_
+  Peter Coles              `@mrcoles`_
   Pierre Chiquet           `@pchiquet`_
   Raphael Pierzina         `@hackebrot`_
   Raony Guimarães Corrêa   `@raonyguimaraes`_
diff --git a/cookiecutter.json b/cookiecutter.json
index 9aff23f22..b5dda0c70 100644
--- a/cookiecutter.json
+++ b/cookiecutter.json
@@ -1,6 +1,6 @@
 {
   "project_name": "My Awesome Project",
-  "project_slug": "{{ cookiecutter.project_name.lower()|replace(' ', '_')|replace('-', '_') }}",
+  "project_slug": "{{ cookiecutter.project_name.lower()|replace(' ', '_')|replace('-', '_')|replace('.', '_')|trim() }}",
   "description": "Behold My Awesome Project!",
   "author_name": "Daniel Roy Greenfeld",
   "domain_name": "example.com",