diff --git a/src/main.rs b/src/main.rs
index 9751122..27ad233 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -348,7 +348,7 @@ pub enum CardType {
     Main,
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize)]
 pub enum CardLanguage {
     Japanese,
     English,