diff --git a/sql/json/revision.metadata.schema.json b/sql/json/revision.metadata.schema.json
index 4ee22627..cb37d7a0 100644
--- a/sql/json/revision.metadata.schema.json
+++ b/sql/json/revision.metadata.schema.json
@@ -1,92 +1,95 @@
 {
     "$schema": "http://json-schema.org/schema#",
     "id": "http://softwareheritage.org/schemas/myschema.json",
 
     "definitions": {
         "person": {
             "type": "object",
             "properties": {
                 "name": {
                     "title": "full name",
                     "type": "string"
                 },
                 "email": {
                     "title": "email address",
                     "type": "string",
                     "format": "email"
                 }
             }
         },
         "pkgid": {
             "title": "debian source package identifier",
             "type": "array",
             "items": [
                 {
                     "title": "package name",
                     "type": "string"
                 },
                 {
                     "title": "package version",
                     "type": "string"
                 }
             ]
         }
     },
 
     "type": "object",
     "properties": {
 
         "original_artifact": {
-            "type": "object",
-            "properties": {
-                "name": { "type": "string" },
-                "length": { "type": "integer", "minimum": 0 },
-                "sha1": { "type": "string" },
-                "sha1_git": { "type": "string" },
-                "sha256": { "type": "string" },
-                "archive_type": { "type": "string" }
+            "type": "array",
+            "items": {
+                "type": "object",
+                "properties": {
+                    "name": { "type": "string" },
+                    "length": { "type": "integer", "minimum": 0 },
+                    "sha1": { "type": "string" },
+                    "sha1_git": { "type": "string" },
+                    "sha256": { "type": "string" },
+                    "archive_type": { "type": "string" }
+                }
             }
         },
 
         "package_info": {
             "type": "object",
             "properties": {
                 "name": { "type": "string" },
                 "version": { "type": "string" },
                 "changelog": {
                     "type": "object",
                     "properties": {
                         "date": { "type": "string", "format": "date-time" },
                         "person": { "$ref": "#/definitions/person" },
                         "history": {
                             "type": "array",
                             "items": { "$ref": "#/definitions/pkgid" }
                         }
                     }
                 },
                 "maintainers": { 
                     "type": "object",
                     "properties": {
                     }
                 },
                 "pgp_signature": { 
                     "type": "object",
                     "properties": {
                         "date": { "type": "string", "format": "date-time" },
                         "keyid": { "type": "string" },
                         "person": { "$ref": "#/definitions/person" }
                     }
                 },
                 "lister_metadata": { 
                     "type": "object",
                     "properties": {
                         "id": { "type": "integer" },
                         "lister": { "type": "string" }
                     }
                 }
             }
         }
 
     }
         
 }