diff --git a/lib/NGCP/BulkProcessor/Projects/Migration/Teletek/Provisioning.pm b/lib/NGCP/BulkProcessor/Projects/Migration/Teletek/Provisioning.pm
index dc3923b..3032589 100644
--- a/lib/NGCP/BulkProcessor/Projects/Migration/Teletek/Provisioning.pm
+++ b/lib/NGCP/BulkProcessor/Projects/Migration/Teletek/Provisioning.pm
@@ -7,7 +7,7 @@ use threads::shared qw();
 use String::MkPasswd qw();
 #use List::Util qw();
 
-use JSON qw();
+use JSON -support_by_pp, -no_export;
 use Tie::IxHash;
 
 use NGCP::BulkProcessor::Projects::Migration::Teletek::Settings qw(
diff --git a/lib/NGCP/BulkProcessor/Projects/t/create_subscriber.t b/lib/NGCP/BulkProcessor/Projects/t/create_subscriber.t
index 5fe0dda..1cadafd 100644
--- a/lib/NGCP/BulkProcessor/Projects/t/create_subscriber.t
+++ b/lib/NGCP/BulkProcessor/Projects/t/create_subscriber.t
@@ -1,5 +1,5 @@
 use Net::Domain qw(hostfqdn);
-use JSON qw();
+use JSON -support_by_pp, -no_export;
 use Test::More;
 use Data::Dumper;
 use LWP::UserAgent;
diff --git a/lib/NGCP/BulkProcessor/RestConnectors/NGCPRestApi.pm b/lib/NGCP/BulkProcessor/RestConnectors/NGCPRestApi.pm
index ddc8f50..7c4c157 100644
--- a/lib/NGCP/BulkProcessor/RestConnectors/NGCPRestApi.pm
+++ b/lib/NGCP/BulkProcessor/RestConnectors/NGCPRestApi.pm
@@ -8,7 +8,9 @@ use threads::shared qw(shared_clone);
 
 use HTTP::Status qw(:constants :is status_message);
 
-use JSON qw();
+use Encode qw();
+
+use JSON -support_by_pp, -no_export;
 use IO::Uncompress::Unzip qw();
 
 use NGCP::BulkProcessor::Globals qw(
@@ -28,7 +30,7 @@ use NGCP::BulkProcessor::LogError qw(
     fileerror
 );
 
-use NGCP::BulkProcessor::RestConnector qw(_add_headers);
+use NGCP::BulkProcessor::RestConnector qw(_add_headers convert_bools);
 
 use NGCP::BulkProcessor::Calendar qw(get_fake_now_string);
 
@@ -61,6 +63,9 @@ my $faketime_header = 'X-Fake-Clienttime';
 our $ITEM_REL_PARAM = 'item_rel';
 #my $logger = getlogger(__PACKAGE__);
 
+my $request_charset = 'utf-8';
+my $response_charset = 'utf-8';
+
 sub _get_api_cert_dir {
     return $working_path . $API_CERT_DIR;
 }
@@ -187,13 +192,16 @@ sub _init_ssl_cert {
 sub _encode_request_content {
     my $self = shift;
     my ($data) = @_;
-    return JSON::to_json($data);
+    return Encode::encode($request_charset,JSON::to_json($data,{ allow_nonref => 1, allow_blessed => 1, convert_blessed => 1, pretty => 0, }));
 }
 
 sub _decode_response_content {
     my $self = shift;
     my ($data) = @_;
-    return ($data ? JSON::from_json($data) : undef);
+    my $decoded;
+    $decoded = JSON::from_json(Encode::decode($response_charset,$data),{ allow_nonref => 1, }) if $data;
+    convert_bools($decoded);
+    return $decoded // $data;
 }
 
 sub _add_post_headers {
diff --git a/lib/NGCP/BulkProcessor/Serialization.pm b/lib/NGCP/BulkProcessor/Serialization.pm
index 57c5c18..cbbfcef 100755
--- a/lib/NGCP/BulkProcessor/Serialization.pm
+++ b/lib/NGCP/BulkProcessor/Serialization.pm
@@ -45,7 +45,7 @@ use MIME::Base64 qw(encode_base64 decode_base64);
 #http://blogs.perl.org/users/steven_haryanto/2010/09/comparison-of-perl-serialization-modules.html
 use Storable; # qw( nfreeze thaw );
 
-use JSON qw();
+use JSON -support_by_pp, -no_export;
 #use JSON::XS; # qw(encode_json decode_json);
 
 use Data::Dump; # qw(dump);
@@ -168,13 +168,13 @@ sub deserialize_xml {
 sub serialize_json {
     my $input_ref = shift;
     #return JSON::XS::encode_json($input_ref);
-    return JSON::to_json($input_ref,{ allow_blessed => 1, convert_blessed => 1, pretty => 0 });
+    return JSON::to_json($input_ref, { allow_nonref => 1, allow_blessed => 1, convert_blessed => 1, pretty => 0 });
 }
 
 sub deserialize_json {
     my $input_ref = shift;
     #return JSON::XS::decode_json($input_ref);
-    return JSON::from_json($$input_ref);
+    return JSON::from_json($$input_ref, { allow_nonref => 1, });
 }
 
 sub serialize_yaml {