diff --git a/composer.json b/composer.json
index f9b565afc2f8..d4bf1364193b 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
   "name": "lochmueller/staticfilecache",
-  "version": "4.0.0-dev",
+  "version": "4.0.0",
   "type": "typo3-cms-extension",
   "description": "Transparent static file cache solution using mod_rewrite and mod_expires. Increase response times for static pages by a factor of 230!!",
   "autoload": {
diff --git a/ext_emconf.php b/ext_emconf.php
index 28f092018926..fc4eb6a0e153 100755
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -4,7 +4,7 @@
     'title' => 'Static File Cache',
     'description' => 'Transparent static file cache solution using mod_rewrite and mod_expires. Increase response times for static pages by a factor of 230!!',
     'category' => 'fe',
-    'version' => '4.0.0-dev',
+    'version' => '4.0.0',
     'state' => 'stable',
     'modify_tables' => 'pages',
     'clearcacheonload' => true,