diff --git a/global-requirements.txt b/global-requirements.txt
index 28f435cc4d..f644d0b6d9 100644
--- a/global-requirements.txt
+++ b/global-requirements.txt
@@ -81,6 +81,7 @@ libvirt-python>=1.2.5                   # LGPLv2+
 lxml>=2.3  # BSD
 Mako>=0.4.0  # MIT
 microversion-parse>=0.1.2  # Apache-2.0
+mistral!=2015.1.0,>=2.0.0  # Apache-2.0
 monotonic>=0.6                          # Apache-2.0
 msgpack-python>=0.4.0  # Apache-2.0
 netaddr>=0.7.12,!=0.7.16  # BSD
diff --git a/upper-constraints.txt b/upper-constraints.txt
index 8dc5363cd4..edc1a1e2f9 100644
--- a/upper-constraints.txt
+++ b/upper-constraints.txt
@@ -167,6 +167,7 @@ logutils===0.3.3
 lxml===3.6.0
 microversion-parse===0.1.3
 mimic===2.1.0
+mistral===2.0.0
 mock===2.0.0
 monotonic===1.1
 mox===0.5.3