diff --git a/internal/sbi/api_policyauthorization.go b/internal/sbi/api_policyauthorization.go
index 46649f8..618a302 100644
--- a/internal/sbi/api_policyauthorization.go
+++ b/internal/sbi/api_policyauthorization.go
@@ -69,7 +69,7 @@ func (s *Server) getPolicyAuthorizationRoutes() []Route {
 
 // PcscfRestoration - Indicates P-CSCF restoration and does not create an Individual Application Session Context
 func (s *Server) HTTPPcscfRestoration(c *gin.Context) {
-	c.JSON(http.StatusNotImplemented, nil)
+	c.JSON(http.StatusNotImplemented, gin.H{})
 }
 
 // api_application_session
diff --git a/internal/sbi/api_uepolicy.go b/internal/sbi/api_uepolicy.go
index e502d71..f4180e5 100644
--- a/internal/sbi/api_uepolicy.go
+++ b/internal/sbi/api_uepolicy.go
@@ -45,17 +45,17 @@ func (s *Server) getUePolicyRoutes() []Route {
 }
 
 func (s *Server) HTTPDeleteIndividualUEPolicyAssociation(c *gin.Context) {
-	c.JSON(http.StatusNotImplemented, nil)
+	c.JSON(http.StatusNotImplemented, gin.H{})
 }
 
 func (s *Server) HTTPReadIndividualUEPolicyAssociation(c *gin.Context) {
-	c.JSON(http.StatusNotImplemented, nil)
+	c.JSON(http.StatusNotImplemented, gin.H{})
 }
 
 func (s *Server) HTTPReportObservedEventTriggersForIndividualUEPolicyAssociation(c *gin.Context) {
-	c.JSON(http.StatusNotImplemented, nil)
+	c.JSON(http.StatusNotImplemented, gin.H{})
 }
 
 func (s *Server) HTTPCreateIndividualUEPolicyAssociation(c *gin.Context) {
-	c.JSON(http.StatusNotImplemented, nil)
+	c.JSON(http.StatusNotImplemented, gin.H{})
 }
diff --git a/internal/sbi/processor/notifier.go b/internal/sbi/processor/notifier.go
index eb3b7ec..d47d3dc 100644
--- a/internal/sbi/processor/notifier.go
+++ b/internal/sbi/processor/notifier.go
@@ -33,7 +33,7 @@ func (p *Processor) HandlePolicyDataChangeNotify(
 
 	PolicyDataChangeNotifyProcedure(supi, policyDataChangeNotification)
 
-	c.JSON(http.StatusNotImplemented, nil)
+	c.JSON(http.StatusNotImplemented, gin.H{})
 }
 
 // TODO: handle Policy Data Change Notify