diff --git a/requirements.txt b/requirements.txt
index 757fff87..f3e12cd1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,6 +5,7 @@ cliff!=2.9.0,>=2.8.0 # Apache-2.0
 osc-lib>=1.8.0 # Apache-2.0
 oslo.utils>=3.33.0 # Apache-2.0
 oslo.i18n>=3.15.3 # Apache-2.0
+oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 keystoneauth1>=3.4.0 # Apache-2.0
 PyYAML>=3.12 # MIT