diff --git a/README.md b/README.md
index 4266286..8aa77ab 100644
--- a/README.md
+++ b/README.md
@@ -4,10 +4,12 @@ Single-header BVH construction and traversal library written as "Sane C++" (or "
 # BVH?
 A Bounding Volume Hierarchy is a data structure used to quickly find intersections in a virtual scene; most commonly between a ray and a group of triangles. You can read more about this in a series of articles on the subject: https://jacco.ompf2.com/2022/04/13/how-to-build-a-bvh-part-1-basics .
 
-Right now tiny_bvh comes with two builders:
+Right now tiny_bvh comes with four builders:
 * ````BVH::Build```` : Efficient plain-C/C+ binned SAH BVH builder which should run on any platform.
 * ````BVH::BuildAVX```` : A highly optimized version of BVH::Build for Intel CPUs.
-
+* ````BVH::BuildNEON```` : An optimized version of BVH::Build for ARM/NEON.
+* ````BVH::BuildHQ```` : A 'spatial splits' BVH builder, for highest BVH quality.
+ 
 Once a BVH is constructed, it may be _refitted_ in case the triangles moved using ````BVH::Refit````. Refitting is substantially faster than rebuilding and works well if the animation is subtle. Refitting does not work if polygon counts change.
 
 A constructed BVH can be used to quickly intersect a ray with the geometry, using ````BVH::Intersect````.