diff --git a/internal/sbi/api_httpcallback.go b/internal/sbi/api_httpcallback.go
index 4a7c15fc..3a26b69f 100644
--- a/internal/sbi/api_httpcallback.go
+++ b/internal/sbi/api_httpcallback.go
@@ -228,7 +228,7 @@ func (s *Server) HTTPHandleDeregistrationNotification(c *gin.Context) {
 	}
 	// TS 23.503 - 5.3.2.3.2 UDM initiated NF Deregistration
 	// The AMF acknowledges the Nudm_UECM_DeRegistrationNotification to the UDM.
-	c.JSON(http.StatusNoContent, nil)
+	c.Status(http.StatusNoContent)
 }
 
 // TS 23.502 - 4.2.2.3.3 Network-initiated Deregistration
diff --git a/internal/util/router_auth_check_test.go b/internal/util/router_auth_check_test.go
index 0804e49b..c7e10f5e 100644
--- a/internal/util/router_auth_check_test.go
+++ b/internal/util/router_auth_check_test.go
@@ -106,7 +106,7 @@ func (m *mockProcessor) HandleSmContextStatusNotify(c *gin.Context,
 	notif models.SmfPduSessionSmContextStatusNotification,
 ) {
 	m.called = true
-	c.JSON(http.StatusNoContent, nil)
+	c.Status(http.StatusNoContent)
 }
 
 type mockServer struct {