diff --git a/src/day9/input.txt b/src/day09/input.txt
similarity index 100%
rename from src/day9/input.txt
rename to src/day09/input.txt
diff --git a/src/day9/mod.rs b/src/day09/mod.rs
similarity index 100%
rename from src/day9/mod.rs
rename to src/day09/mod.rs