diff --git a/_docs/public/index.html b/_docs/public/index.html
index fbb63bc58..f7694fec2 100644
--- a/_docs/public/index.html
+++ b/_docs/public/index.html
@@ -36,7 +36,7 @@ pre {
 }
 </style>
 <h1>Ebiten (海老天)</h1>
-<p>v1.2.0-alpha</p>
+<p>v1.3.0-alpha</p>
 <ul>
   <li>A simple SNES-like 2D game library in Go</li>
   <li>Works on
diff --git a/version.txt b/version.txt
index 8864779ee..a3f536739 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.2.0-alpha
+1.3.0-alpha