diff --git a/lower-constraints.txt b/lower-constraints.txt
index bddc7c4d..70e2e227 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -41,7 +41,7 @@ netifaces==0.10.4
 networkx==1.10
 os-client-config==1.28.0
 oslo.i18n==3.15.3
-oslo.serialization==2.18.0
+oslo.serialization==4.0.0
 oslo.utils==3.33.0
 oslotest==3.2.0
 pbr==2.0.0