diff --git a/benches/ed25519_benchmarks.rs b/benches/ed25519_benchmarks.rs
index d4f8f53..5db1361 100644
--- a/benches/ed25519_benchmarks.rs
+++ b/benches/ed25519_benchmarks.rs
@@ -59,7 +59,7 @@ mod ed25519_benches {
     }
 
     fn verify_batch_signatures(c: &mut Criterion) {
-        static BATCH_SIZES: [u8; 6] = [4, 8, 16, 32, 64, 96, 128, 256];
+        static BATCH_SIZES: [usize; 8] = [4, 8, 16, 32, 64, 96, 128, 256];
 
         c.bench_function_over_inputs(
             "Ed25519 batch signature verification",