diff --git a/routers/web/webfinger.go b/routers/web/webfinger.go
index 35f3bbff8..a30844360 100644
--- a/routers/web/webfinger.go
+++ b/routers/web/webfinger.go
@@ -125,6 +125,7 @@ func WebfingerQuery(ctx *context.Context) {
 		},
 	}
 
+	ctx.Resp.Header().Add("Content-Type", "application/jrd+json")
 	ctx.Resp.Header().Add("Access-Control-Allow-Origin", "*")
 	ctx.JSON(http.StatusOK, &webfingerJRD{
 		Subject: fmt.Sprintf("acct:%s@%s", url.QueryEscape(u.Name), appURL.Host),