diff --git a/requirements.txt b/requirements.txt
index 9dd57a9..7c426e6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,14 +12,14 @@
 testrepository>=0.0.18 # Apache-2.0/BSD
 pyOpenSSL>=0.14 # Apache-2.0
 oslo.concurrency>=3.5.0 # Apache-2.0
-oslo.config>=3.7.0 # Apache-2.0
+oslo.config>=3.9.0 # Apache-2.0
 oslo.i18n>=2.1.0 # Apache-2.0
 oslo.log>=1.14.0 # Apache-2.0
 oslo.serialization>=1.10.0 # Apache-2.0
 oslo.utils>=3.5.0 # Apache-2.0
 six>=1.9.0 # MIT
 iso8601>=0.1.9 # MIT
-fixtures>=1.3.1 # Apache-2.0/BSD
+fixtures<2.0,>=1.3.1 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
 PyYAML>=3.1.0 # MIT
 stevedore>=1.5.0 # Apache-2.0