diff --git a/requirements.txt b/requirements.txt
index 9241facfe0..f74e574a39 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ oslo.i18n!=3.15.2,>=2.1.0 # Apache-2.0
 oslo.log>=3.22.0 # Apache-2.0
 oslo.middleware>=3.27.0 # Apache-2.0
 oslo.policy>=1.23.0 # Apache-2.0
-oslo.serialization>=1.10.0 # Apache-2.0
+oslo.serialization!=2.19.1,>=1.10.0 # Apache-2.0
 oslo.utils>=3.20.0 # Apache-2.0
 oauthlib>=0.6 # BSD
 pysaml2<4.0.3,>=2.4.0 # Apache-2.0