diff --git a/Cargo.toml b/Cargo.toml
index e862436..be7f653 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,7 +31,7 @@ serde = { version = "1.0.116", default-features = false, optional = true }
 serde_bytes = { version = "0.11.5", default-features = false, features = ["alloc"], optional = true }
 arbitrary = { version = "1.1.0", optional = true }
 
-no_std_io2 = { version = "0.8.1", default-features = false }
+no_std_io2 = { version = "0.9.3", default-features = false }
 
 [dev-dependencies]
 multihash-derive = { version = "0.9.2", default-features = false }