diff --git a/Project.toml b/Project.toml
index 39b7f14..87cc838 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "Elfel"
 uuid = "9ca883c9-bd92-40d2-857a-2c75d8956e5d"
 authors = ["Petr Krysl <pkrysl@ucsd.edu>"]
-version = "0.5.0"
+version = "0.4.0"
 
 [deps]
 Blink = "ad839575-38b3-5650-b840-f874b8c74a25"