diff --git a/data/reco.appdata.xml.in b/data/reco.appdata.xml.in
index c20c5f85..d4ddddf8 100644
--- a/data/reco.appdata.xml.in
+++ b/data/reco.appdata.xml.in
@@ -38,7 +38,7 @@
   <content_rating type="oars-1.1" />
 
   <releases>
-    <release version="4.0.0" date="2022-10-09" urgency="high">
+    <release version="4.0.0" date="2022-10-10" urgency="high">
       <description>
         <ul>
           <li>Migrate to GTK 4, the latest version of GTK</li>
diff --git a/meson.build b/meson.build
index 11a3c812..a8f0ffbf 100644
--- a/meson.build
+++ b/meson.build
@@ -1,7 +1,7 @@
 project(
     'com.github.ryonakano.reco',
     'vala', 'c',
-    version: '3.3.1',
+    version: '4.0.0',
     meson_version: '>=0.57.0'
 )