diff --git a/contrib/lib/Cargo.toml b/contrib/lib/Cargo.toml
index 19604d5570..b669ab53bd 100644
--- a/contrib/lib/Cargo.toml
+++ b/contrib/lib/Cargo.toml
@@ -48,7 +48,7 @@ rocket = { version = "0.5.0-dev", path = "../../core/lib/", default-features = f
 log = "0.4"
 
 # Serialization and templating dependencies.
-serde = { version = "1.0", optional = true }
+serde = { version = "1.0", optional = true, features = ["derive"] }
 serde_json = { version = "1.0.26", optional = true }
 rmp-serde = { version = "0.14.0", optional = true }