diff --git a/pkg/apis/logging/v1alpha2/register.go b/pkg/apis/logging/v1alpha2/register.go
index 8e89b4632d082fe7794c22380574870c71b037ab..fa4b59d849de9ad473059e93b98084a07041276b 100644
--- a/pkg/apis/logging/v1alpha2/register.go
+++ b/pkg/apis/logging/v1alpha2/register.go
@@ -69,7 +69,7 @@ func addWebService(c *restful.Container) error {
 		Writes(v1alpha2.QueryResult{}).
 		Returns(http.StatusOK, RespOK, v1alpha2.QueryResult{})).
 		Consumes(restful.MIME_JSON, restful.MIME_XML).
-		Produces(restful.MIME_JSON, restful.MIME_OCTET)
+		Produces(restful.MIME_JSON, "text/plain")
 
 	ws.Route(ws.GET("/workspaces/{workspace}").To(logging.LoggingQueryWorkspace).
 		Doc("Query logs against the specific workspace.").
diff --git a/pkg/apis/tenant/v1alpha2/register.go b/pkg/apis/tenant/v1alpha2/register.go
index df75d8b8de0faa9a41ac7db65d9e385a09d96122..f4a916e1700d3bb6fedd0d4e253e016a4a4d67ef 100644
--- a/pkg/apis/tenant/v1alpha2/register.go
+++ b/pkg/apis/tenant/v1alpha2/register.go
@@ -179,7 +179,7 @@ func addWebService(c *restful.Container) error {
 		Writes(v1alpha2.Response{}).
 		Returns(http.StatusOK, RespOK, v1alpha2.Response{})).
 		Consumes(restful.MIME_JSON, restful.MIME_XML).
-		Produces(restful.MIME_JSON, restful.MIME_OCTET)
+		Produces(restful.MIME_JSON, "text/plain")
 
 	c.Add(ws)
 	return nil
diff --git a/pkg/apiserver/logging/logging.go b/pkg/apiserver/logging/logging.go
index f824adbea1275f853b9f09176124189126418f6f..39a73e608575bad580b7a706b8f3427f1a127ded 100644
--- a/pkg/apiserver/logging/logging.go
+++ b/pkg/apiserver/logging/logging.go
@@ -162,7 +162,8 @@ func logExport(param v1alpha2.QueryParameters, request *restful.Request, respons
 		return
 	}
 
-	response.Header().Set("Content-Type", restful.MIME_OCTET)
+	response.Header().Set(restful.HEADER_ContentType, "text/plain")
+	response.Header().Set("Content-Disposition", "attachment")
 
 	// keep search context alive for 1m
 	param.ScrollTimeout = time.Minute
diff --git a/pkg/apiserver/tenant/tenant.go b/pkg/apiserver/tenant/tenant.go
index 205e9219911d919c80929eaf92473d846005dde5..d0f6a35b293d59394ef1c04b2d0bdfc8eebdf1a2 100644
--- a/pkg/apiserver/tenant/tenant.go
+++ b/pkg/apiserver/tenant/tenant.go
@@ -348,7 +348,8 @@ func LogQuery(req *restful.Request, resp *restful.Response) {
 		logging.LoggingQueryCluster(req, resp)
 	default:
 		if operation == "export" {
-			resp.Header().Set("Content-Type", restful.MIME_OCTET)
+			resp.Header().Set(restful.HEADER_ContentType, "text/plain")
+			resp.Header().Set("Content-Disposition", "attachment")
 			resp.Write(nil)
 		} else {
 			resp.WriteAsJson(loggingv1alpha2.QueryResult{Read: new(loggingv1alpha2.ReadResult)})