diff --git a/NEWS.md b/NEWS.md
index ae60389..acc230e 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -8,7 +8,7 @@ email: charles.lelosq@anu.edu.au
 
 Licence MIT: see LICENCE.md
 
-# 0.4.1 (stable)
+# 0.4.2 (stable)
 
 - requires PyCall v0.19 or higher
 
diff --git a/Project.toml b/Project.toml
index bae9d6e..4eba552 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "Spectra"
 uuid = "391af1a9-06f1-59d3-8d21-0be089654739"
 author = "Charles Le Losq <charles.lelosq@anu.edu.au>"
-version = "0.4.1"
+version = "0.4.2"
 
 [deps]
 Conda = "8f4d0f93-b110-5947-807f-2305c1781a2d"