diff --git a/idsig/Cargo.toml b/idsig/Cargo.toml
index 91b2842..49ae18d 100644
--- a/idsig/Cargo.toml
+++ b/idsig/Cargo.toml
@@ -6,6 +6,7 @@
 
 [dependencies]
 anyhow = "1.0"
+byteorder = "1.1"
 ring = "0.16"
 num-derive = "0.3"
 num-traits = "0.2"