diff --git a/Cargo.toml b/Cargo.toml
index 268f6b0..ef4d6d2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,7 +12,7 @@ description = "A binary serialization / deserialization strategy and implementat
 
 [dependencies]
 rustc-serialize = "0.3.*"
-byteorder = "0.3.*"
+byteorder = "0.4.*"
 num = "*"
 serde = "*"