diff --git a/plugins/app-json/triggers.go b/plugins/app-json/triggers.go
index 28b37a7eb..253f89722 100644
--- a/plugins/app-json/triggers.go
+++ b/plugins/app-json/triggers.go
@@ -144,8 +144,10 @@ func TriggerCorePostExtract(appName string, sourceWorkDir string) error {
 	if common.FileExists(processSpecificAppJSON) {
 		common.LogInfo1("Validating app.json file")
 		result, err := common.CallPlugnTrigger(common.PlugnTriggerInput{
-			Trigger: "app-json-is-valid",
-			Args:    []string{appName, processSpecificAppJSON},
+			Trigger:      "app-json-is-valid",
+			Args:         []string{appName, processSpecificAppJSON},
+			StreamStdout: true,
+			StreamStderr: true,
 		})
 		if err != nil {
 			if result.StderrContents() != "" {