diff --git a/package.yaml b/package.yaml
index 181da97..dfe967e 100644
--- a/package.yaml
+++ b/package.yaml
@@ -1,7 +1,7 @@
 # Adapted from new-template.hsfiles
 
 name:                utoy
-version:             0.3
+version:             0.4
 git:                 "https://git.pbrinkmeier.de/paul/utoy"
 license:             MIT
 author:              "Paul Brinkmeier"
diff --git a/utoy.cabal b/utoy.cabal
index b422c9a..1f1716c 100644
--- a/utoy.cabal
+++ b/utoy.cabal
@@ -5,7 +5,7 @@ cabal-version: 1.12
 -- see: https://github.com/sol/hpack
 
 name:           utoy
-version:        0.3
+version:        0.4
 author:         Paul Brinkmeier
 maintainer:     hallo@pbrinkmeier.de
 copyright:      2023 Paul Brinkmeier
diff --git a/utoy.nix b/utoy.nix
index 7159bff..7e70966 100644
--- a/utoy.nix
+++ b/utoy.nix
@@ -8,7 +8,7 @@ let
   utoy =
     { mkDerivation }:
     mkDerivation {
-      version = "0.3";
+      version = "0.4";
       pname = "utoy";
       license = pkgs.lib.licenses.mit;
       src =