diff --git a/ios/RNFetchBlobReqBuilder.m b/ios/RNFetchBlobReqBuilder.m
index 16154436e..16963bb5f 100644
--- a/ios/RNFetchBlobReqBuilder.m
+++ b/ios/RNFetchBlobReqBuilder.m
@@ -69,7 +69,7 @@ +(void) buildMultipartRequest:(NSDictionary *)options
                 [mheaders setValue:[NSString stringWithFormat:@"%lu",[postData length]] forKey:@"Content-Length"];
                 [mheaders setValue:@"100-continue" forKey:@"Expect"];
                 // appaned boundary to content-type
-                [mheaders setValue:[NSString stringWithFormat:@"multipart/form-data; charset=utf-8; boundary=%@", boundary] forKey:@"content-type"];
+                [mheaders setValue:[NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary] forKey:@"content-type"];
                 [request setHTTPMethod: method];
                 [request setAllHTTPHeaderFields:mheaders];
                 onComplete(request, [formData length]);