diff --git a/src/lib.rs b/src/lib.rs
index 9db176bf..05c01e2b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -15,7 +15,7 @@ Simply add the following to your `Cargo.toml` file:
 
 ```.ignore
 [dependencies]
-nalgebra = "0.18"
+nalgebra = "0.21"
 ```