diff --git a/Cargo.toml b/Cargo.toml
index 14ff95f..046cfa4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,6 +25,7 @@ enum_dispatch = "0.2.1"
 image = "0.23.0"
 rand = "0.7"
 serde_yaml = "0.8"
+structopt = "0.3"
 
 [dependencies.nalgebra]
 version = "0.20.0"