diff --git a/SPECS/python-openstackclient.spec b/SPECS/python-openstackclient.spec
index 8cea3b8..dbb1daa 100644
--- a/SPECS/python-openstackclient.spec
+++ b/SPECS/python-openstackclient.spec
@@ -59,6 +59,7 @@ BuildRequires:    python-reno
 BuildRequires:    python-requestsexceptions
 BuildRequires:    python-openstacksdk
 BuildRequires:    python-osprofiler
+BuildRequires:    python-dateutil
 
 Requires:         python-pbr
 Requires:         python-babel