diff --git a/src/storage/conversion/RdfToQuadConverter.ts b/src/storage/conversion/RdfToQuadConverter.ts
index 07f8f3974..f807581c1 100644
--- a/src/storage/conversion/RdfToQuadConverter.ts
+++ b/src/storage/conversion/RdfToQuadConverter.ts
@@ -13,7 +13,10 @@ import type { RepresentationConverterArgs } from './RepresentationConverter';
  */
 export class RdfToQuadConverter extends BaseTypedRepresentationConverter {
   public constructor() {
-    super(rdfParser.getContentTypes(), INTERNAL_QUADS);
+    const inputTypes = rdfParser.getContentTypes()
+      // ContentType application/json MAY NOT be converted to Quad.
+      .then((types): string[] => types.filter((type): boolean => type !== 'application/json'));
+    super(inputTypes, INTERNAL_QUADS);
   }
 
   public async handle({ representation, identifier }: RepresentationConverterArgs): Promise<Representation> {
diff --git a/test/unit/storage/conversion/RdfToQuadConverter.test.ts b/test/unit/storage/conversion/RdfToQuadConverter.test.ts
index a9a4be871..99736d1b7 100644
--- a/test/unit/storage/conversion/RdfToQuadConverter.test.ts
+++ b/test/unit/storage/conversion/RdfToQuadConverter.test.ts
@@ -18,12 +18,17 @@ describe('A RdfToQuadConverter', (): void => {
   const identifier: ResourceIdentifier = { path: 'path' };
 
   it('supports serializing as quads.', async(): Promise<void> => {
-    const types = await rdfParser.getContentTypes();
-    for (const type of types) {
+    const types = rdfParser.getContentTypes()
+      .then((inputTypes): string[] => inputTypes.filter((type): boolean => type !== 'application/json'));
+    for (const type of await types) {
       await expect(converter.getOutputTypes(type)).resolves.toEqual({ [INTERNAL_QUADS]: 1 });
     }
   });
 
+  it('may not handle application/json to quad conversion.', async(): Promise<void> => {
+    await expect(converter.getOutputTypes('application/json')).resolves.toEqual({ });
+  });
+
   it('can handle turtle to quad conversions.', async(): Promise<void> => {
     const metadata = new RepresentationMetadata('text/turtle');
     const representation = { metadata } as Representation;