diff --git a/Cargo.toml b/Cargo.toml
index 6996115..e774934 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,3 +24,4 @@ unic-langid = { version = "0.9.6", features = ["macros"], optional = true }
 
 [features]
 unic-langid = ["dep:unic-langid"]
+serde = ["dep:serde"]