diff --git a/day3/main.zig b/day3/main.zig
index bebfce4..f869d38 100644
--- a/day3/main.zig
+++ b/day3/main.zig
@@ -9,6 +9,7 @@ pub fn main() !void {
     defer grid.deinit();
 
     const numbers = try parseNumbers(grid);
+    defer numbers.deinit();
 
     var total1: u128 = 0;