diff --git a/Cargo.lock b/Cargo.lock
index 0042d01..456ed03 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -60,7 +60,7 @@ version = "0.2.0"
 dependencies = [
  "assert_approx_eq 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.33.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "nalgebra 0.21.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nalgebra 0.21.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "pbr 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "rayon 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.114 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -207,7 +207,7 @@ dependencies = [
 
 [[package]]
 name = "nalgebra"
-version = "0.21.0"
+version = "0.21.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "approx 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -615,7 +615,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum matrixmultiply 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "dcfed72d871629daa12b25af198f110e8095d7650f5f4c61c5bac28364604f9b"
 "checksum maybe-uninit 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "60302e4db3a61da70c0cb7991976248362f30319e88850c487b9b95bbf059e00"
 "checksum memoffset 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "75189eb85871ea5c2e2c15abbdd541185f63b408415e5051f5cac122d8c774b9"
-"checksum nalgebra 0.21.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d630f146ae751cfb43db9e0ad6bd73819a546a38baa5d4a9de69823c389c78a1"
+"checksum nalgebra 0.21.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d6b6147c3d50b4f3cdabfe2ecc94a0191fd3d6ad58aefd9664cf396285883486"
 "checksum num-complex 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "107b9be86cd2481930688277b675b0114578227f034674726605b8a482d8baf8"
 "checksum num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)" = "b85e541ef8255f6cf42bbfe4ef361305c6c135d10919ecc26126c4e5ae94bc09"
 "checksum num-rational 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f2885278d5fe2adc2f75ced642d52d879bffaceb5a2e0b1d4309ffdfb239b454"