diff --git a/requirements.txt b/requirements.txt
index 6dedf8d..d5799fb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,6 +4,7 @@ dopy==0.3.5
 boto>=2.5
 boto3
 azure==2.0.0rc5
+msrest==0.4.1
 apache-libcloud
 six
 pyopenssl