diff --git a/CREDITS b/CREDITS
index cf1af5f..895b5e7 100644
--- a/CREDITS
+++ b/CREDITS
@@ -11,3 +11,4 @@ https://pyglet.readthedocs.io/en/latest/
 
 Thanks to the following other libraries used in this game:
 pypresence - https://github.com/qwertyquerty/pypresence - Used for Discord Rich Presence
+numpy - https://github.com/numpy/numpy - Used for vector maths to make it fast
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