diff --git a/BUILD.md b/BUILD.md
index 6613786903..d068d6d458 100644
--- a/BUILD.md
+++ b/BUILD.md
@@ -6,6 +6,7 @@
 * [OpenSSL](https://www.openssl.org/related/binaries.html) ~> 1.0.1g
   * IMPORTANT: OpenSSL 1.0.1g is critical to avoid a security vulnerability.
 * [Intel Threading Building Blocks](https://www.threadingbuildingblocks.org/) ~> 4.3
+* [Bullet Physics Engine](http://bulletphysics.org) ~> 2.82
 
 ### OS Specific Build Guides
 * [BUILD_OSX.md](BUILD_OSX.md) - additional instructions for OS X.