diff --git a/Cargo.toml b/Cargo.toml
index 2813f58..9adfd7c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,4 +17,4 @@ keywords = ["linear-algebra"]
 [dependencies]
 cblas-sys = "0.1"
 libc = "0.2"
-num-complex = { version = "0.3", default-features = false }
+num-complex = { version = "0.4", default-features = false }