diff --git a/requirements.txt b/requirements.txt
index 16c0e7fab..1c372c24f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ oslo.i18n>=1.5.0 # Apache-2.0
 oslo.log>=1.8.0 # Apache-2.0
 oslo.serialization>=1.4.0 # Apache-2.0
 oslo.service>=0.10.0 # Apache-2.0
-oslo.utils>=2.4.0 # Apache-2.0
+oslo.utils!=2.6.0,>=2.4.0 # Apache-2.0
 pecan>=1.0.0
 Pint>=0.5 # BSD
 psutil<2.0.0,>=1.1.1