diff --git a/lib/src/day15/mod.rs b/lib/src/day15/mod.rs
index 6da0bf0..749515d 100644
--- a/lib/src/day15/mod.rs
+++ b/lib/src/day15/mod.rs
@@ -18,8 +18,7 @@ impl Day for Day15 {
     }
 
     fn part2(&mut self) -> String {
-        const ARRAY_REPEAT_VALUE: Vec<(&str, u8)> = Vec::new();
-        let mut boxes: [Vec<(&str, u8)>; 256] = [ARRAY_REPEAT_VALUE; 256];
+        let mut boxes = [const { Vec::<(&str, u8)>::new() }; 256];
 
         for operation in self.input.split(',') {
             let ((box_id, label), focal_length) = operation
diff --git a/lib/src/lib.rs b/lib/src/lib.rs
index 4e09a00..f4d60c6 100644
--- a/lib/src/lib.rs
+++ b/lib/src/lib.rs
@@ -1,3 +1,5 @@
+#![feature(inline_const)]
+
 use std::{collections::HashMap, num::NonZeroUsize};
 
 use clru::CLruCache;