diff --git a/src/day_one.rs b/src/day1.rs
similarity index 100%
rename from src/day_one.rs
rename to src/day1.rs
diff --git a/src/day_two.rs b/src/day2.rs
similarity index 100%
rename from src/day_two.rs
rename to src/day2.rs
diff --git a/src/day_three.rs b/src/day3.rs
similarity index 100%
rename from src/day_three.rs
rename to src/day3.rs
diff --git a/src/main.rs b/src/main.rs
index 68bcf50..535adac 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,6 +1,6 @@
-mod day_one;
-mod day_three;
-mod day_two;
+mod day1;
+mod day2;
+mod day3;
 
 use std::fs::File;
 use std::io::{self, BufRead, BufReader};
@@ -11,12 +11,12 @@ fn main() -> io::Result<()> {
         .lines()
         .map(|line| line.unwrap().parse().unwrap())
         .collect();
-    day_one::main(masses);
+    day1::main(masses);
 
-    day_two::part_one();
-    day_two::part_two();
+    day2::part_one();
+    day2::part_two();
 
-    day_three::main()?;
+    day3::main()?;
 
     Ok(())
 }