diff --git a/pyproject.toml b/pyproject.toml
index a3336f7f..9884461f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,6 +27,7 @@ dependencies = [
     "pyyaml",
     "scp",
     "spiceypy~=6.0",
+    "numpy==2.3.4",
     "sunpy~=6.0.0",
     "watchdog~=6.0",
     "stixdcpy==3.0",