diff --git a/SOURCES/modulemd.src.txt b/SOURCES/modulemd.src.txt
index 85d76fa..5f3c1af 100644
--- a/SOURCES/modulemd.src.txt
+++ b/SOURCES/modulemd.src.txt
@@ -686,7 +686,9 @@ data:
         ref: rhel-8.4.0
       tzdata:
         rationale: Runtime dependency
-        ref: rhel-8.4.0
+        # 8.5.0 zero-day https://errata.devel.redhat.com/advisory/83233
+        # was built from the rhel-8.6.0 branch for some reason
+        ref: rhel-8.6.0
       v4l-utils:
         rationale: Runtime dependency
         ref: rhel-8.4.0