diff --git a/Projects/AthSimulation/version.txt b/Projects/AthSimulation/version.txt
index d9ea053e016d5e9e8de8d87b05e0644f624cd127..37c75c009f36279d6aa02c1ef839c917a9fa33a6 100644
--- a/Projects/AthSimulation/version.txt
+++ b/Projects/AthSimulation/version.txt
@@ -1 +1 @@
-21.0.39
+21.0.40