diff --git a/generate_cert.sh b/generate_cert.sh
old mode 100644
new mode 100755
index 36d2bb780..0273c17ca
--- a/generate_cert.sh
+++ b/generate_cert.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/zsh
 
 # generate certificate and key
-libressl req -x509 -newkey rsa:4096 -nodes -keyout key.pem -sha256 -days 356 -out cert.pem
+openssl req -x509 -newkey rsa:4096 -nodes -keyout key.pem -sha256 -days 356 -out cert.pem
diff --git a/server.js b/server.js
index 511d2fd4e..2cba267e1 100644
--- a/server.js
+++ b/server.js
@@ -315,8 +315,8 @@ if (!isLightweightMobile) {
 
 
 let options = {
-    key: fs.readFileSync('key.pem'),
-    cert: fs.readFileSync('cert.pem')
+    key: fs.readFileSync(__dirname + '/key.pem'),
+    cert: fs.readFileSync(__dirname + '/cert.pem')
 };
 const httpServer = require('https').createServer(options, webServer);
 const http = httpServer.listen(serverPort, function () {