diff --git a/Cargo.toml b/Cargo.toml
index 4d37c80..f662d5e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ datasets = []
 ndarray = { version = "0.15", optional = true }
 nalgebra = { version = "0.23.0", optional = true }
 num-traits = "0.2.12"
-num = "0.3.0"
+num = "0.4.0"
 rand = "0.8.3"
 rand_distr = "0.4.0"
 serde = { version = "1.0.115", features = ["derive"], optional = true }