diff --git a/Pod/Classes/PNObject+PNObjectConnection.m b/Pod/Classes/PNObject+PNObjectConnection.m
index 40da60a..5ed3add 100644
--- a/Pod/Classes/PNObject+PNObjectConnection.m
+++ b/Pod/Classes/PNObject+PNObjectConnection.m
@@ -65,7 +65,7 @@
                         failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error))failure {
 
     if ([[PNObjectConfig sharedInstance] currentOauthCredential] && ![[[PNObjectConfig sharedInstance] currentOauthCredential] isExpired]) {
-
+        [[[PNObjectConfig sharedInstance] manager] setRequestSerializer:[[PNObjectConfig sharedInstance] jsonSerializer]];
         [[[PNObjectConfig sharedInstance] manager] POST:[[[PNObjectConfig sharedInstance] baseUrl] stringByAppendingFormat:@"%@",endPoint]  parameters:parameters progress:uploadProgress success:^(NSURLSessionDataTask *task, id responseObject) {
 
             if (success) {
@@ -100,7 +100,7 @@
                         failure:(nullable void (^)(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error))failure {
 
     if ([[PNObjectConfig sharedInstance] currentOauthCredential] && ![[[PNObjectConfig sharedInstance] currentOauthCredential] isExpired]) {
-
+ 		[[[PNObjectConfig sharedInstance] manager] setRequestSerializer:[[PNObjectConfig sharedInstance] jsonSerializer]];
         [[[PNObjectConfig sharedInstance] manager] POST:[[[PNObjectConfig sharedInstance] baseUrl] stringByAppendingFormat:@"%@",endPoint]
                                              parameters:parameters
                               constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {