diff --git a/requirements.txt b/requirements.txt
index af508583..fe1032ff 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -23,9 +23,9 @@ oslo.middleware!=2.0.0,>=1.2.0 # Apache-2.0
 oslo.policy>=0.5.0 # Apache-2.0
 oslo.rootwrap>=2.0.0 # Apache-2.0
 oslo.serialization>=1.4.0 # Apache-2.0
-oslo.service>=0.1.0
+oslo.service>=0.1.0 # Apache-2.0
 oslo.utils>=1.6.0 # Apache-2.0
-oslo.concurrency>=2.0.0 # Apache-2.0
+oslo.concurrency>=2.1.0 # Apache-2.0
 paramiko>=1.13.0
 Paste
 PasteDeploy>=1.5.0