diff --git a/main.py b/main.py
index 4bebae99..f6ded9d5 100644
--- a/main.py
+++ b/main.py
@@ -4,7 +4,7 @@
 from utils.config import Umi
 from ui.win_main import MainWin
 
-Umi.ver = '1.3.1 dev'
+Umi.ver = '1.3.1 alpha1'
 Umi.pname = 'Umi-OCR'
 Umi.name = f'{Umi.pname} v{Umi.ver}'
 Umi.website = 'https://github.com/hiroi-sora/Umi-OCR'