diff --git a/copier.yml b/copier.yml
index aebddfe..36b698a 100644
--- a/copier.yml
+++ b/copier.yml
@@ -28,6 +28,10 @@ project_organization:
     type: str
     help: What github organization will your project live under? 
     default: my_organization
+    validator: >-
+        {% if not (project_organization | regex_search('^[a-z][a-z0-9\_\-]+$')) %}
+        Must use a lowercase letter followed by one or more of (a-z, 0-9, _, -).
+        {% endif %}
 
 author_name:
     type: str