diff --git a/Cargo.toml b/Cargo.toml
index 168a40d..210d122 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,7 +16,7 @@ travis-ci = { repository = "serde-rs/json" }
 appveyor = { repository = "serde-rs/json" }
 
 [dependencies]
-serde = "1.0.60"
+serde = { version = "1.0.60", default-features = false, features = ["alloc"] }
 indexmap = { version = "1.0", optional = true }
 itoa = "0.4.3"
 ryu = "0.2"