diff --git a/subprojects/robotpy-wpimath/pyproject.toml b/subprojects/robotpy-wpimath/pyproject.toml
index db911e46..027b35ff 100644
--- a/subprojects/robotpy-wpimath/pyproject.toml
+++ b/subprojects/robotpy-wpimath/pyproject.toml
@@ -6,6 +6,7 @@ license = "BSD-3-Clause"
 name = "robotpy-wpimath"
 url = "https://github.com/robotpy/robotpy-wpimath"
 install_requires = [
+    "numpy",
     "robotpy-wpiutil==THIS_VERSION",
 ]