diff --git a/rhizome/Cargo.toml b/rhizome/Cargo.toml
index 551e34d..f168fad 100644
--- a/rhizome/Cargo.toml
+++ b/rhizome/Cargo.toml
@@ -36,7 +36,7 @@ proptest = { version = "1.0", optional = true }
 rhizome-macro = { path = "../rhizome-macro", version = "0.1" }
 rhizome-runtime = { path = "../rhizome-runtime", version = "0.1" }
 serde = { version = "1.0", features = ["rc", "derive"] }
-serde_ipld_dagcbor = "0.3.0"
+serde_ipld_dagcbor = "0.4.0"
 slotmap = { version = "1.0" }
 string-interner = "0.14"
 thiserror = "1.0"