diff --git a/requirements.txt b/requirements.txt
index 0bdbf290..339b4a5b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -41,7 +41,7 @@ jsonschema!=2.5.0,<3.0.0,>=2.0.0
 automaton>=0.5.0 # Apache-2.0
 
 # For common utilities
-oslo.utils>=2.4.0 # Apache-2.0
+oslo.utils!=2.6.0,>=2.4.0 # Apache-2.0
 oslo.serialization>=1.4.0 # Apache-2.0
 
 # For lru caches and such