commit bcaba3a830c6c0f3e0f38273b1fcf53b9cc154cc
Author: asarfaty <asarfaty@vmware.com>
Date:   Tue Oct 6 14:29:24 2020 +0200

    pin isort to 4.3.21
    
    isort 4.3.21 is the last isort release that supports python2
    
    Change-Id: I029d0ade2ed4fa660a061f5c707ecbf3ebfd443d

diff --git a/lower-constraints.txt b/lower-constraints.txt
index 688b750..476b67b 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -8,6 +8,7 @@ flake8-import-order==0.12
 flake8==2.6.2
 hacking==1.1.0
 httplib2==0.9.1
+isort==4.3.21
 kombu==4.0.0
 mock==2.0.0
 netaddr==0.7.18
diff --git a/test-requirements.txt b/test-requirements.txt
index aa45eff..6eb2e3c 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -14,3 +14,4 @@ oslotest>=3.2.0 # Apache-2.0
 stestr>=1.0.0 # Apache-2.0
 testtools>=2.2.0 # MIT
 pylint==1.7.6 # GPLv2
+isort==4.3.21 # MIT