diff --git a/build.env b/build.env
index 99ae4c62b..813324b00 100644
--- a/build.env
+++ b/build.env
@@ -38,6 +38,9 @@ MINIKUBE_VERSION=v1.14.1
 VM_DRIVER=none
 CHANGE_MINIKUBE_NONE_USER=true
 
+# Rook options
+ROOK_VERSION=v1.3.9
+
 # e2e settings
 # - enable CEPH_CSI_RUN_ALL_TESTS when running tests with if it has root
 #   permissions on the host