diff --git a/bioimageio/spec/VERSION b/bioimageio/spec/VERSION
index da6f5505c..6db2377f6 100644
--- a/bioimageio/spec/VERSION
+++ b/bioimageio/spec/VERSION
@@ -1,3 +1,3 @@
 {
-    "version": "0.4.9"
+    "version": "0.4.9post1"
 }