diff --git a/requirements.txt b/requirements.txt
index 8f6e64e6d..0a08c3432 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ debtcollector>=1.2.0 # Apache-2.0
 keystoneauth1>=2.21.0 # Apache-2.0
 oslo.config!=4.3.0,!=4.4.0,>=4.0.0 # Apache-2.0
 oslo.i18n!=3.15.2,>=2.1.0 # 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
 positional>=1.1.1 # Apache-2.0
 requests>=2.14.2 # Apache-2.0