diff --git a/global-requirements.txt b/global-requirements.txt
index bc88f9cc76..3f2eff9eae 100644
--- a/global-requirements.txt
+++ b/global-requirements.txt
@@ -125,7 +125,7 @@ os-net-config  # Apache-2.0
 os-refresh-config  # Apache-2.0
 os-testr>=0.4.1  # Apache-2.0
 overtest>=0.10.0  # Apache-2.0
-ovs>=2.4.0;python_version=='2.7'        # Apache-2.0
+ovs>=2.5.0;python_version=='2.7'        # Apache-2.0
 os-win>=0.2.3                           # Apache-2.0
 paramiko>=1.16.0  # LGPL
 Parsley  # MIT