diff --git a/Project.toml b/Project.toml
index e0b5594..8bb11f2 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "QuantumInputOutput"
 uuid = "18f9eda6-924c-47c7-a881-996695cfd7c6"
-version = "0.3.0"
+version = "0.4.0"
 
 [deps]
 DataInterpolations = "82cc6244-b520-54b8-b5a6-8a565e85f1d0"