diff --git a/Cargo.toml b/Cargo.toml
index 63c8a8c..7bdbe3b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,4 +7,11 @@ version = "0.2.1"
 edition = "2021"
 
 [dependencies]
-csv = "1.2.2"
+csv = { version = "1.2.2", optional = true }
+
+[features]
+bin = ["dep:csv"]
+
+[[bin]]
+name = "diameter"
+required-features = ["bin"]