diff --git a/y2018/control_loops/python/BUILD b/y2018/control_loops/python/BUILD
index 26b2da4..c74396c 100644
--- a/y2018/control_loops/python/BUILD
+++ b/y2018/control_loops/python/BUILD
@@ -191,6 +191,7 @@
     target_compatible_with = ["@platforms//os:linux"],
     deps = [
         ":python_init",
+        "@python_repo//:numpy",
     ],
 )