diff --git a/doc/schemas/staticbackup.schema.json b/doc/schemas/staticbackup.schema.json
index 73b7009e7..bc9daeb2e 100644
--- a/doc/schemas/staticbackup.schema.json
+++ b/doc/schemas/staticbackup.schema.json
@@ -9,7 +9,7 @@
     "scb": {
       "type": "array",
       "items": {
-        "type": "string",
+        "type": "hex",
         "description": "SCB of a channel in TLV format"
       }
     }