diff --git a/Cargo.toml b/Cargo.toml
index 2f72b35..9b6f6aa 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,7 +28,7 @@ std = []
 
 [dependencies]
 alga = { version = "0.9", optional = true }
-cgmath = { version = "0.16", optional = true }
+cgmath = { version = "0.17", optional = true }
 nalgebra = { version = ">=0.14, <0.19", optional = true }
 num-traits = { version = "0.2", optional = true }
 serde =  { version = "1", optional = true }
diff --git a/src/cgmath.rs b/src/cgmath.rs
index 457ef7f..5d46b4b 100644
--- a/src/cgmath.rs
+++ b/src/cgmath.rs
@@ -1,5 +1,5 @@
 use cgmath::{
-  BaseFloat, BaseNum, InnerSpace, Quaternion, Vector1, Vector2, Vector3, Vector4
+  BaseFloat, BaseNum, InnerSpace, Quaternion, Vector1, Vector2, Vector3, Vector4, VectorSpace
 };
 
 use crate::interpolate::{Additive, Interpolate, Linear, One, cubic_hermite_def};