diff --git a/timbuctoo-instancev4/src/main/java/nl/knaw/huygens/timbuctoo/v5/dropwizard/endpoints/GraphQl.java b/timbuctoo-instancev4/src/main/java/nl/knaw/huygens/timbuctoo/v5/dropwizard/endpoints/GraphQl.java
index 9da60ed5bd..5fea906675 100644
--- a/timbuctoo-instancev4/src/main/java/nl/knaw/huygens/timbuctoo/v5/dropwizard/endpoints/GraphQl.java
+++ b/timbuctoo-instancev4/src/main/java/nl/knaw/huygens/timbuctoo/v5/dropwizard/endpoints/GraphQl.java
@@ -32,6 +32,8 @@
 import javax.ws.rs.core.StreamingOutput;
 import javax.ws.rs.core.UriBuilder;
 import java.net.URI;
+import java.time.Duration;
+import java.time.Instant;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
@@ -162,7 +164,7 @@ public Response executeGraphql(String query, String acceptHeader, String acceptP
 
     final UserPermissionCheck userPermissionCheck = new UserPermissionCheck(user, permissionFetcher);
     final GraphQLSchema schema = graphqlGetter.get();
-    final GraphQLSchema transform = schema.transform(sb ->
+    final GraphQLSchema transform = schema.transformWithoutTypes(sb ->
         sb.codeRegistry(schema.getCodeRegistry().transform(crb ->
             crb.fieldVisibility(new PermissionBasedFieldVisibility(userPermissionCheck, dataSetRepository)))));
     final GraphQL.Builder builder = GraphQL.newGraphQL(transform);