diff --git a/docs/schema/pub_chain_full.json b/docs/schema/pub_chain_full.json
index fde2f3082..270f909f1 100644
--- a/docs/schema/pub_chain_full.json
+++ b/docs/schema/pub_chain_full.json
@@ -1,4 +1,5 @@
 {
+    "$schema": "http://json-schema.org/draft-07/schema",
     "definitions": {
         "binary": {
             "type": "string",