diff --git a/docs/Introduction/Introduction.mdx b/docs/Introduction/Introduction.mdx
index c1df16d..cf8f227 100644
--- a/docs/Introduction/Introduction.mdx
+++ b/docs/Introduction/Introduction.mdx
@@ -46,7 +46,7 @@ I will continuously update this tutorial series to teach you related techniques
 Decent experience in one of the GPU graphics APIs like OpenGL and D3D is required.
 If you were relatively new to computer graphics, you should at least have rendered your first 3D scene and practiced instanced rendering.
 
-GPU apis have built-in line rendering functionalities.
+GPU APIs have built-in line rendering functionalities.
 It's totally fine if you never heard about `LINES`, `LINE_STRIP`, and `LINE_LOOP` GPU primitives.
 We won't use the functionalities in this tutorial series.
 If you're interested in learning about their drawbacks, you can check out mattdesl's article titled [Drawing Lines is Hard](https://mattdesl.svbtle.com/drawing-lines-is-hard).