diff --git a/requirements.txt b/requirements.txt
index 9c0841c..1ba84e9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@
 
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 Jinja2!=2.9.0,!=2.9.1,!=2.9.2,!=2.9.3,!=2.9.4,>=2.8 # BSD License (3 clause)
-oslo.serialization>=1.10.0 # Apache-2.0
+oslo.serialization!=2.19.1,>=1.10.0 # Apache-2.0
 psutil>=3.2.2 # BSD
 six>=1.9.0 # MIT
 oslo.i18n!=3.15.2,>=2.1.0 # Apache-2.0