diff --git a/requirements.txt b/requirements.txt
index 9b29f12..6a27a37 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@
 
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 eventlet!=0.18.3,!=0.20.1,>=0.18.2 # MIT
-oslo.config>=5.2.0 # Apache-2.0
+oslo.config!=4.3.0,!=4.4.0,<8.0.0;python_version<'3.6'  # Apache-2.0
 oslo.log>=3.36.0 # Apache-2.0
 oslo.concurrency>=3.26.0 # Apache-2.0
 oslo.policy>=1.35.0 # Apache-2.0
@@ -16,7 +16,7 @@ keystonemiddleware>=4.17.0 # Apache-2.0
 autobahn>=18.10.1 # MIT License
 python-neutronclient>=6.7.0 # Apache-2.0
 python-designateclient>=2.11.0 # Apache-2.0
-pecan!=1.0.2,!=1.0.3,!=1.0.4,!=1.2,>=1.0.0 # BSD
+pecan!=1.0.2,!=1.0.3,!=1.0.4,!=1.2,!=1.4.0  # BSD
 PyMySQL>=0.7.6  # MIT License
 osprofiler>=1.5.0 # Apache-2.0
 WSME>=0.8  # MIT