diff --git a/validator/json/schema.json b/validator/json/schema.json
index fe2cf4a..29d84f7 100644
--- a/validator/json/schema.json
+++ b/validator/json/schema.json
@@ -266,7 +266,7 @@
           ]
         },
         "language": {
-          "type": "string",
+          "type": ["string", "null"],
           "examples": ["en", "de", "cs", "ab"]
         },
         "abstract": {
@@ -305,13 +305,8 @@
           "items": {
             "$ref": "#/definitions/Reference"
           }
-        },
-        "answers": {
-          "type": "array",
-          "items": {},
-          "$ref": "https://c3voc.de/schedule/submission#/definitions/Answers"
         }
-      },
+     },
       "required": [
         "abstract",
         "date",
@@ -419,10 +414,6 @@
         },
         "biography": {
           "type": ["string", "null"]
-        },
-        "answers": {
-          "type": "array",
-          "items": {}
         }
       },
       "required": ["name"]