diff --git a/requirements.txt b/requirements.txt
index 5959adbf..41d2c9f4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ pbr!=2.1.0,>=2.0.0 # Apache-2.0
 oslo.concurrency>=3.8.0 # 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.service>=1.10.0 # Apache-2.0
 oslo.utils>=3.20.0 # Apache-2.0
 requests>=2.14.2 # Apache-2.0
diff --git a/test-requirements.txt b/test-requirements.txt
index 6a22e662..e6d66718 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -15,4 +15,4 @@ testtools>=1.4.0 # MIT
 # Doc requirements
 doc8 # Apache-2.0
 sphinx>=1.6.2 # BSD
-openstackdocstheme>=1.11.0 # Apache-2.0
\ No newline at end of file
+openstackdocstheme>=1.11.0 # Apache-2.0