diff --git a/app/graphql/schema.graphql b/app/graphql/schema.graphql
index 0065c474f..32543dbcd 100644
--- a/app/graphql/schema.graphql
+++ b/app/graphql/schema.graphql
@@ -4438,12 +4438,12 @@ type Identifier {
   """
   The value of the identifier.
   """
-  identifier: String!
+  identifier: String
 
   """
   The type of identifier.
   """
-  identifierType: String!
+  identifierType: String
 
   """
   The url of the identifier.
diff --git a/app/graphql/types/identifier_type.rb b/app/graphql/types/identifier_type.rb
index cb6384c44..c4e248dd4 100644
--- a/app/graphql/types/identifier_type.rb
+++ b/app/graphql/types/identifier_type.rb
@@ -3,7 +3,7 @@
 class IdentifierType < BaseObject
   description "Information about identifiers"
 
-  field :identifier_type, String, null: false, hash_key: "identifierType", description: "The type of identifier."
-  field :identifier, String, null: false, description: "The value of the identifier."
+  field :identifier_type, String, null: true, hash_key: "identifierType", description: "The type of identifier."
+  field :identifier, String, null: true, description: "The value of the identifier."
   field :identifier_url, String, null: true, hash_key: "identifierUrl", description: "The url of the identifier."
 end