diff --git a/egui_demo_lib/Cargo.toml b/egui_demo_lib/Cargo.toml
index c9045741..9cf8b17b 100644
--- a/egui_demo_lib/Cargo.toml
+++ b/egui_demo_lib/Cargo.toml
@@ -17,7 +17,7 @@ include = [ "**/*.rs", "Cargo.toml"]
 [dependencies]
 egui = { version = "0.6.0", path = "../egui" }
 epi = { version = "0.6.0", path = "../epi" }
-serde = "1"
+serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 
 # Http fetch app: