diff --git a/Cargo.toml b/Cargo.toml
index 7dd0db8..17116a5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,6 +28,7 @@ kdlv1 = { package = "kdl", version = "4.7.0", optional = true }
 [dev-dependencies]
 miette = { version = "7.2.0", features = ["fancy"] }
 pretty_assertions = "1.3.0"
+serde = { version = "1.0.210", features = ["derive"] }
 
 # docs.rs-specific configuration
 [package.metadata.docs.rs]