diff --git a/crates/rotortree/Cargo.toml b/crates/rotortree/Cargo.toml
index 2dc6186..d55e15f 100644
--- a/crates/rotortree/Cargo.toml
+++ b/crates/rotortree/Cargo.toml
@@ -28,7 +28,7 @@ serde = ["dep:serde", "dep:serde_with"]
 # surface, so a minor bump could silently change it. The byte-identity unit
 # test guards behavior; this pin guards the API.
 blake3 = { version = "=1.8.5", default-features = false, optional = true }
-wincode = { version = "0.4", default-features = false, features = ["alloc", "derive"], optional = true }
+wincode = { version = "0.6", default-features = false, features = ["alloc", "derive"], optional = true }
 parking_lot = { version = "0.12", optional = true }
 arc-swap = { version = "1", optional = true }
 rayon = { version = "1", optional = true }