diff --git a/lib/log/log_writer_io.dart b/lib/log/log_writer_io.dart
index 9bd8e78..faa9ff7 100644
--- a/lib/log/log_writer_io.dart
+++ b/lib/log/log_writer_io.dart
@@ -35,6 +35,7 @@ class LogWriterIO extends IsolateBase implements LogWriter {
 
   void onWrite(Object? message) {
     // print('write in file: $message');
+    if(!_file.existsSync()) _file.createSync(recursive: true);
     _file.writeAsStringSync(message as String, mode: FileMode.append);
   }
 
diff --git a/lib/utils/slack/slack_sender.dart b/lib/utils/slack/slack_sender.dart
index 28c1e46..99b88d7 100644
--- a/lib/utils/slack/slack_sender.dart
+++ b/lib/utils/slack/slack_sender.dart
@@ -96,7 +96,7 @@ class SlackSender {
   Future sendBuild(String appName, SlackBuildType buildType, Color color,
       String version, String downloadURL,
       {String channel = 'build'}) async {
-    final buildURL = 'http://toki-labs.com/build/';
+    final buildURL = 'https://toki-labs.com/cdn/build/';
     String thumUrl = buildType == SlackBuildType.android
         ? '${buildURL}android.png'
         : '${buildURL}appstore.png';