diff --git a/src/scoring.rs b/src/scoring.rs
index 8b3a7ed..1108197 100644
--- a/src/scoring.rs
+++ b/src/scoring.rs
@@ -6,6 +6,7 @@ use std::{cmp, fmt::Display};
 /// Score of a password check.
 #[derive(Debug, Clone, Copy, Hash, PartialEq, Eq, PartialOrd, Ord)]
 #[non_exhaustive]
+#[cfg_attr(feature = "ser", derive(serde::Serialize, serde::Deserialize))]
 pub enum Score {
     /// Can be cracked with 10^3 guesses or less.
     Zero = 0,
@@ -31,13 +32,6 @@ impl Display for Score {
     }
 }
 
-#[cfg(feature = "ser")]
-impl serde::Serialize for Score {
-    fn serialize<S: serde::Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
-        i8::from(*self).serialize(serializer)
-    }
-}
-
 #[derive(Debug, Clone)]
 pub struct GuessCalculation {
     /// Estimated guesses needed to crack the password