diff --git a/CHANGELOG.md b/CHANGELOG.md
index 12ae4991..24d5ccc0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,5 @@
+## Adminer dev
+
 ## Adminer 5.2.0 (released 2025-04-08)
 - Autocomplete SQL commands
 - Do not edit NULL values by Modify (bug #967)
diff --git a/adminer/include/version.inc.php b/adminer/include/version.inc.php
index 13b35454..d793c0e7 100644
--- a/adminer/include/version.inc.php
+++ b/adminer/include/version.inc.php
@@ -1,4 +1,4 @@
 <?php
 namespace Adminer;
 
-const VERSION = "5.2.0";
+const VERSION = "5.2.1-dev";