diff --git a/Cargo.toml b/Cargo.toml
index 0e8f13a..c4dbb23 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,7 +23,7 @@ name = "smallvec"
 path = "lib.rs"
 
 [dependencies]
-serde = { version = "1", optional = true }
+serde = { version = "1", optional = true, default-features = false }
 
 [dev_dependencies]
 bincode = "1.0.1"