diff --git a/db_scripts/diff/15314.up b/db_scripts/diff/15314.up
new file mode 100644
index 00000000..5cbcaec3
--- /dev/null
+++ b/db_scripts/diff/15314.up
@@ -0,0 +1,7 @@
+USE prosody;
+SET autocommit=0;
+
+ALTER TABLE `sipwise_mam` charset=utf8mb4, MODIFY COLUMN `stanza` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+ALTER TABLE `sipwise_offline` charset=utf8mb4, MODIFY COLUMN `stanza` TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+
+COMMIT;