diff --git a/pkstrings/src/lib.rs b/pkstrings/src/lib.rs
index f1ee4e7..5e8bd45 100644
--- a/pkstrings/src/lib.rs
+++ b/pkstrings/src/lib.rs
@@ -203,7 +203,7 @@ lazy_static! {
             (0x50, '@'),
         ];
 
-        let mut vec: Vec<Option<char>> = [None; 255].to_vec();
+        let mut vec: Vec<Option<char>> = [None; 256].to_vec();
         for (k, v) in tmp.iter() {
             vec[*k] = Some(*v);
         }