diff --git a/package.json b/package.json
index ebe217a..d21af76 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@cocreators-ee/apity",
   "description": "A typed fetch client for openapi-typescript with Svelte support",
-  "version": "0.0.4",
+  "version": "0.0.5",
   "readme": "README.md",
   "engines": {
     "node": ">= 12.0.0",
diff --git a/src/svelte/fetcher.ts b/src/svelte/fetcher.ts
index f3e1aa6..394e1bc 100644
--- a/src/svelte/fetcher.ts
+++ b/src/svelte/fetcher.ts
@@ -14,7 +14,30 @@ import type {
   Method,
 } from '../types.js'
 import type { ApiRequest, ApiResponse, SvelteCreateFetch } from './types.js'
-import { ApiError } from '../types.js'
+import { ApiError, LimitedResponse } from '../types.js'
+
+const JSON_CONTENT_TYPES = ['application/json', 'application/ld+json']
+
+async function getResponseBody(response: LimitedResponse) {
+  // no content
+  if (response.status === 204) {
+    return undefined
+  }
+  const contentType = response.headers.get('content-type')
+  if (contentType && JSON_CONTENT_TYPES.includes(contentType)) {
+    return await response.json()
+  } else if (contentType && contentType.indexOf('text') === -1) {
+    // if the response is neither JSON nor text, return binary data as is
+    // @ts-ignore
+    return await response.blob()
+  }
+  const text = await response.text()
+  try {
+    return JSON.parse(text)
+  } catch (e) {
+    return text
+  }
+}
 
 /***
  * Make an API call and compose an ApiResponse object from the result
@@ -25,7 +48,7 @@ async function fetchAndParse<R>(request: Request): Promise<ApiResponse<R>> {
   try {
     const response = await request.realFetch(url, init)
     try {
-      const body = response.status === 204 ? undefined : await response.json()
+      const body = await getResponseBody(response)
       if (response.ok) {
         return {
           status: response.status,
@@ -40,7 +63,7 @@ async function fetchAndParse<R>(request: Request): Promise<ApiResponse<R>> {
         }
       }
     } catch (e) {
-      console.warn('Failed to parse JSON from the response body', e)
+      console.warn('Failed to parse the response body', e)
       return {
         status: -2,
         data: undefined,
diff --git a/src/types.ts b/src/types.ts
index ddf873f..56c2e40 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -39,9 +39,11 @@ type OpResponseTypes<OP> = OP extends {
         ? S
         : R[S] extends { content: { 'application/json': infer C } } // openapi 3
         ? C
+        : R[S] extends TextContentType
+        ? string
         : S extends 'default'
         ? R[S]
-        : unknown
+        : Blob
     }
   : never
 
@@ -198,3 +200,13 @@ export class ApiError extends Error {
     this.data = response.data
   }
 }
+
+type TextContentType = {
+  content:
+    | { 'text/css': any }
+    | { 'text/csv': any }
+    | { 'text/html': any }
+    | { 'text/javascript': any }
+    | { 'text/plain': any }
+    | { 'text/xml': any }
+}