diff --git a/Cargo.toml b/Cargo.toml
index 9098f81..f48dc8f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,7 +26,7 @@ approx = "0.3"
 byteordered = "0.4.0"
 flate2 = "1.0.1"
 num = "0.2.0"
-num-derive = "0.2.0"
+num-derive = "0.3.0"
 num-traits = "0.2.0"
 quick-error = "1.2.0"
 safe-transmute = "0.11.0-rc.1"