diff --git a/global-requirements.txt b/global-requirements.txt
index 5bd20bb70d..4dcf55f769 100644
--- a/global-requirements.txt
+++ b/global-requirements.txt
@@ -143,7 +143,8 @@ oslo.policy>=1.23.0  # Apache-2.0
 oslo.privsep>=1.9.0,!=1.17.0  # Apache-2.0
 oslo.reports>=0.6.0  # Apache-2.0
 oslo.rootwrap>=5.0.0  # Apache-2.0
-oslo.serialization>=1.10.0              # Apache-2.0
+# NOTE(mriedem): oslo.serialization 2.19.1 is blocked for bug 1593641
+oslo.serialization>=1.10.0,!=2.19.1      # Apache-2.0
 oslo.service>=1.10.0                     # Apache-2.0
 oslo.utils>=3.20.0                       # Apache-2.0
 oslo.vmware>=2.17.0                     # Apache-2.0