diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 58ce5039..c2886fd7 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -70,6 +70,7 @@ Prerequisites:
 * go >= 1.17
 * kubectl >= 1.20
 * kustomize >= 4.4
+* coreutils (on Mac OS)
 
 Install the [controller-runtime/envtest](https://github.com/kubernetes-sigs/controller-runtime/tree/master/tools/setup-envtest) binaries with: