diff --git a/hooks/pre_gen_project.py b/hooks/pre_gen_project.py
index 6d9c2ba..39ee4f6 100644
--- a/hooks/pre_gen_project.py
+++ b/hooks/pre_gen_project.py
@@ -7,7 +7,7 @@
 project_slug = '{{ cookiecutter.project_slug }}'
 
 if not re.match(MODULE_REGEX, project_slug):
-    print('ERROR: %s is not a valid Python module name!' % project_slug)
+    print(f'ERROR: {project_slug} is not a valid Python module name!')
 
     # exits with status 1 to indicate failure
     sys.exit(1)