diff --git a/requirements.txt b/requirements.txt
index a5de3e9..1abdddc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,4 +5,4 @@
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 oslo.utils>=3.20.0 # 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
diff --git a/test-requirements.txt b/test-requirements.txt
index a95ab89..6fd5dfb 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -14,7 +14,7 @@ testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=1.4.0 # MIT
 oslo.utils>=3.20.0 # 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
 
 # releasenotes
 reno!=2.3.1,>=1.8.0 # Apache-2.0