diff --git a/src/bin/scaffold.rs b/src/bin/scaffold.rs
index 4f01f82..341621c 100644
--- a/src/bin/scaffold.rs
+++ b/src/bin/scaffold.rs
@@ -8,10 +8,10 @@ use std::{
     process,
 };
 
-const MODULE_TEMPLATE: &str = r###"pub fn part_one(input: &str) -> Option<u32> {
+const MODULE_TEMPLATE: &str = r###"pub fn part_one(input: &str) -> Option<usize> {
     None
 }
-pub fn part_two(input: &str) -> Option<u32> {
+pub fn part_two(input: &str) -> Option<usize> {
     None
 }
 fn main() {