diff --git a/requirements.txt b/requirements.txt
index 26764922..fde74f0a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,24 +12,27 @@ gnocchiclient>=2.1.0  # Apache-2.0
 lxml>=2.3
 oslo.db>=4.8.0,!=4.13.1,!=4.13.2,!=4.15.0 # Apache-2.0
 oslo.config>=2.6.0 # Apache-2.0
-oslo.i18n>=1.5.0 # Apache-2.0
+oslo.i18n>=1.5.0,<3.13.0 # Apache-2.0
 oslo.log>=1.2.0 # Apache-2.0
 oslo.policy>=0.5.0 # Apache-2.0
 PasteDeploy>=1.5.0
-pbr<2.0,>=0.11
+pbr>=1.8,<2.0.0
 pecan>=0.8.0
 oslo.messaging>=5.2.0 # Apache-2.0
-oslo.middleware>=3.22.0 # Apache-2.0
+oslo.middleware>=3.22.0,<3.24.0 # Apache-2.0
 oslo.serialization>=1.4.0 # Apache-2.0
-oslo.utils>=3.5.0 # Apache-2.0
+oslo.utils>=3.5.0,<3.23.0 # Apache-2.0
 python-ceilometerclient>=1.5.0
 python-keystoneclient>=1.6.0
 pytz>=2013.6
 requests>=2.5.2
 six>=1.9.0
-stevedore>=1.5.0 # Apache-2.0
+stevedore>=1.5.0,<1.21.0 # Apache-2.0
 tooz>=1.28.0 # Apache-2.0
 WebOb>=1.2.3
 WSME>=0.8
 cachetools>=1.1.6
 cotyledon
+# fake caps for indirect requirements
+debtcollector<1.12.0
+oslo.context<2.13.0