Replace multipart/mixed with multipart/form-data #26

Author: jonas-jasas

src/main/java/com/convertapi/client/ConvertApi.java

@@ -52,7 +52,7 @@ public static CompletableFuture<ConversionResult> convert(String fromFormat, Str
 
             HttpUrl url = urlBuilder.addQueryParameter("storefile", "true").build();
 
-            MultipartBody.Builder multipartBuilder = new MultipartBody.Builder();
+            MultipartBody.Builder multipartBuilder = new MultipartBody.Builder().setType(MultipartBody.FORM);
             HashMap<String, List<String>> paramValues = getParamValues(params);
 
             for (String name : paramValues.keySet()) {