diff --git a/dsp/Cargo.toml b/dsp/Cargo.toml
index 0f82bd2..e3be45b 100644
--- a/dsp/Cargo.toml
+++ b/dsp/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2018"
 
 [dependencies]
 serde = { version = "1.0", features = ["derive"], default-features = false }
-num = { version = "0.4.0", default-features = false }
+num-complex = { version = "0.4.0", features = ["serde"], default-features = false }
 miniconf = "0.1"
 
 [dev-dependencies]
diff --git a/dsp/src/complex.rs b/dsp/src/complex.rs
index 1eb003f..bf3e76d 100644
--- a/dsp/src/complex.rs
+++ b/dsp/src/complex.rs
@@ -1,4 +1,4 @@
-pub use num::Complex;
+pub use num_complex::Complex;
 
 use super::{atan2, cossin};