diff --git a/Cargo.toml b/Cargo.toml
index c137675..ceb2960 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,4 +23,4 @@ itertools = "0.13.0"
 
 [dev-dependencies]
 serde_json = "1.0.0"
-tree_hash_derive = "0.8.0"
+tree_hash_derive = "0.9.0"