diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6e1172a9..7487b236 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,28 @@ documented here.
 
 This project adheres to [Semantic Versioning](https://semver.org/).
 
+
+## [0.21.0]
+In this release, we are no longer relying on traits from the __alga__ crate for our generic code.
+Instead, we use traits from the new [simba](https://crates.io/crates/simba) crate which are both
+simpler, and allow for significant optimizations like AoSoA SIMD. 
+
+Refer to the [monthly Rustsim blogpost](https://www.rustsim.org/blog/2020/04/01/this-month-in-rustsim/)
+for details about this switch and its benefits.
+
+### Added
+ * It is now possible to use SIMD types like `simba::f32x4` as scalar types for nalgebra's matrices and
+   geometric types.
+### Modified
+ * Use of traits like `alga::general::{RealField, ComplexField}` have now been replaced by
+  `simba::scalar::{RealField, ComplexField}`.
+ * The implementation of traits from the __alga__ crate (and well as the dependency to _alga__) are now
+   omitted unless the `alga` cargo feature is activated.
+### Removed
+ * The `Neg` unary operator is no longer implemented for `UnitComplex` and `UnitQuaternion`. This caused
+   hard-to-track errors when we mistakenly write, e.g., `-q * v` instead of `-(q * v)`.
+ * The `na::convert_unchecked` is no longer marked as unsafe.
+ 
 ## [0.20.0]
 ### Added
   * `cholesky.rank_one_update(...)` which performs a rank-one update on the cholesky decomposition of a matrix.
diff --git a/Cargo.toml b/Cargo.toml
index 9abb98aa..21a365e3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name    = "nalgebra"
-version = "0.20.0"
+version = "0.21.0"
 authors = [ "Sébastien Crozet <developer@crozet.re>" ]
 
 description = "Linear algebra library with transformations and statically-sized or dynamically-sized matrices."
diff --git a/examples/cargo/Cargo.toml b/examples/cargo/Cargo.toml
index 95ec21c8..91b9b72b 100644
--- a/examples/cargo/Cargo.toml
+++ b/examples/cargo/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.0.0"
 authors = [ "You" ]
 
 [dependencies]
-nalgebra = "0.20.0"
+nalgebra = "0.21.0"
 
 [[bin]]
 name = "example"
diff --git a/nalgebra-glm/Cargo.toml b/nalgebra-glm/Cargo.toml
index 456dabce..b72e2988 100644
--- a/nalgebra-glm/Cargo.toml
+++ b/nalgebra-glm/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "nalgebra-glm"
-version = "0.6.0"
+version = "0.7.0"
 authors = ["sebcrozet <developer@crozet.re>"]
 
 description = "A computer-graphics oriented API for nalgebra, inspired by the C++ GLM library."
@@ -25,4 +25,4 @@ abomonation-serialize = [ "nalgebra/abomonation-serialize" ]
 num-traits = { version = "0.2", default-features = false }
 approx = { version = "0.3", default-features = false }
 simba = { version = "0.1", default-features = false }
-nalgebra = { path =  "..", version = "0.20", default-features = false }
+nalgebra = { path =  "..", version = "0.21", default-features = false }
diff --git a/nalgebra-lapack/Cargo.toml b/nalgebra-lapack/Cargo.toml
index 3710064b..b262e8b9 100644
--- a/nalgebra-lapack/Cargo.toml
+++ b/nalgebra-lapack/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name    = "nalgebra-lapack"
-version = "0.12.0"
+version = "0.13.0"
 authors = [ "Sébastien Crozet <developer@crozet.re>", "Andrew Straw <strawman@astraw.com>" ]
 
 description   = "Linear algebra library with transformations and satically-sized or dynamically-sized matrices."
@@ -23,7 +23,7 @@ accelerate = ["lapack-src/accelerate"]
 intel-mkl  = ["lapack-src/intel-mkl"]
 
 [dependencies]
-nalgebra      = { version = "0.20", path = ".." }
+nalgebra      = { version = "0.21", path = ".." }
 num-traits    = "0.2"
 num-complex   = { version = "0.2", default-features = false }
 simba         = "0.1"
@@ -34,7 +34,7 @@ lapack-src    = { version = "0.5", default-features = false }
 # clippy = "*"
 
 [dev-dependencies]
-nalgebra   = { version = "0.20", path = "..", features = [ "arbitrary" ] }
+nalgebra   = { version = "0.21", path = "..", features = [ "arbitrary" ] }
 quickcheck = "0.9"
 approx     = "0.3"
 rand       = "0.7"