diff --git a/README.md b/README.md
index 43dab7e..31570da 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@ _This library is free and will stay free, but if you would like to support devel
 
 Version         | Changes        | 
 ----------------|----------------|
+**1.4.0** | Fixed bug when using C mode. SSE'd all vec4 operations. Removed zeroing for better performance.
 **1.3.0** | Removed need to `#define HANDMADE_MATH_CPP_MODE`. C++ definitions are now included automatically in C++ environments.
 **1.2.0** | Added equality functions for `HMM_Vec2`, `HMM_Vec3`, and `HMM_Vec4`, and SSE'd `HMM_MultiplyMat4` and `HMM_Transpose`.
 **1.1.5** | Added `Width` and `Height` to `HMM_Vec2`, and made it so you can supply your own `SqrtF`.