diff --git a/live/PrusaSlicer.version b/live/PrusaSlicer.version
index 24454ad..b920812 100644
--- a/live/PrusaSlicer.version
+++ b/live/PrusaSlicer.version
@@ -1,10 +1,10 @@
 2.8.1
-alpha=2.8.0-alpha5
+alpha=2.9.0-alpha1
 beta=2.8.0-beta1
 
 [common]
 release = 2.8.1
-alpha = 2.8.0-alpha5
+alpha = 2.9.0-alpha1
 beta = 2.8.0-beta1
 rc = 2.8.1-rc1