diff --git a/packages/debian/changelog b/packages/debian/changelog
index 5408c77cb..c0e7e6e62 100644
--- a/packages/debian/changelog
+++ b/packages/debian/changelog
@@ -144,6 +144,7 @@ cgrates (0.11.0~dev) UNRELEASED; urgency=medium
   * [AgentS] Added *routes_maxcost flag
   * [SessionS] Added *sessionChargeable session option to control session charging 
   * [SessionS] Replaced max_call_duration config with default_usage for each ToR
+  * [SessionS] Added JSON and GOB BiRPC support
   
  -- DanB <danb@cgrates.org>  Wed, 19 Feb 2020 13:25:52 +0200
 
diff --git a/sessions/sessions.go b/sessions/sessions.go
index b74d12efc..2d100c38b 100644
--- a/sessions/sessions.go
+++ b/sessions/sessions.go
@@ -3038,14 +3038,14 @@ type V1ProcessEventArgs struct {
 
 // V1ProcessEventReply is the reply for the ProcessEvent API
 type V1ProcessEventReply struct {
-	MaxUsage           map[string]time.Duration
-	Cost               map[string]float64 // Cost is the cost received from Rater, ignoring accounting part
-	ResourceAllocation map[string]string
-	Attributes         map[string]*engine.AttrSProcessEventReply
-	Routes             map[string]*engine.SortedRoutes
-	ThresholdIDs       map[string][]string
-	StatQueueIDs       map[string][]string
-	STIRIdentity       map[string]string
+	MaxUsage           map[string]time.Duration                  `json:",omitempty"`
+	Cost               map[string]float64                        `json:",omitempty"` // Cost is the cost received from Rater, ignoring accounting part
+	ResourceAllocation map[string]string                         `json:",omitempty"`
+	Attributes         map[string]*engine.AttrSProcessEventReply `json:",omitempty"`
+	Routes             map[string]*engine.SortedRoutes           `json:",omitempty"`
+	ThresholdIDs       map[string][]string                       `json:",omitempty"`
+	StatQueueIDs       map[string][]string                       `json:",omitempty"`
+	STIRIdentity       map[string]string                         `json:",omitempty"`
 }
 
 // AsNavigableMap is part of engine.NavigableMapper interface