diff --git a/src/day3.rs b/src/day3.rs
index a8f7b4a..e2167dc 100644
--- a/src/day3.rs
+++ b/src/day3.rs
@@ -1,5 +1,5 @@
 use aoc_runner_derive::{aoc, aoc_generator};
-use memoize::memoize;
+use cached::proc_macro::cached;
 use misc::POW10;
 
 #[aoc_generator(day3)]
@@ -10,7 +10,7 @@ fn parse(input: &str) -> Vec<Vec<u8>> {
         .collect()
 }
 
-#[memoize]
+#[cached]
 fn max_joltage(bank: Vec<u8>, n: usize) -> u64 {
     if n == 1 {
         return *bank.iter().max().unwrap() as u64;