diff --git a/Cargo.toml b/Cargo.toml
index 0f843d35..e5bf4b43 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,7 +27,7 @@ serde_json = {version = "1.0.67", optional = true}
 bincode = {version = "1.3.1", optional = true}
 tskit-derive = {version = "0.2.0", path = "tskit-derive", optional = true}
 mbox = "0.6.0"
-delegate = "0.9.0"
+delegate = "0.10.0"
 
 [dev-dependencies]
 anyhow = {version = "1.0.66"}