Pin babel version

Upstream released a new version of Babel which some requirements are
blocking. Pin it so that future updates like this don't break us.

Change-Id: I5681a7055e40655ef62c51e28f682d1832b37f4e
Signed-off-by: Thanh Ha <thanh.ha@linuxfoundation.org>

diff --git a/requirements.txt b/requirements.txt
index 4175d91..cf8491a 100644 (file)
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,4 +8,5 @@ sphinxcontrib-programoutput
 sphinx_bootstrap_theme>=0.4.14
 
 # workarounds to prevent upstream from breaking us
-pbr!=2.1.0
+babel<2.4.0
+pbr<2.1.0