diff --git a/src/utils/num_sequence.rs b/src/utils/num_sequence.rs
index 9666b04..bae5a89 100644
--- a/src/utils/num_sequence.rs
+++ b/src/utils/num_sequence.rs
@@ -22,7 +22,7 @@ impl<T: Integer + Copy + FromStr> NumberSequence<T> {
             }
             else if let Some((start_str, end_str)) = group.split_once('-') {
                 if let (Ok(start), Ok(end)) = (start_str.parse::<T>(), end_str.parse::<T>()) {
-                    ranges.push((start, end));
+                    ranges.push((start, end + T::one()));
                 } else {
                     return None;
                 }