diff --git a/ChangeLog b/ChangeLog
index 21bfbc29a..13fbc0e7e 100755
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,4 @@
-Version 2.3.18:
+Version 2.3.99beta1:
 
 * Updated translations: it [Speedvicio].
 * (Launcher) Replaced fengestad.no/fs-uae URLs with fs-uae.net ones.
diff --git a/VERSION b/VERSION
index 307578525..a1196cdf8 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.3.17dev
+2.3.99beta1