diff --git a/miso-ghc.nix b/miso-ghc.nix
index c3a5bcfc..18ce9a3e 100644
--- a/miso-ghc.nix
+++ b/miso-ghc.nix
@@ -3,7 +3,7 @@
 }:
 mkDerivation {
   pname = "miso";
-  version = "0.3.0.0";
+  version = "0.4.0.0";
   src = ./.;
   isLibrary = true;
   isExecutable = true;
diff --git a/miso-ghcjs.nix b/miso-ghcjs.nix
index 026d40d1..6ccffa0d 100644
--- a/miso-ghcjs.nix
+++ b/miso-ghcjs.nix
@@ -5,7 +5,7 @@
 }:
 mkDerivation {
   pname = "miso";
-  version = "0.3.0.0";
+  version = "0.4.0.0";
   src = ./.;
   isLibrary = true;
   isExecutable = true;
diff --git a/miso.cabal b/miso.cabal
index 098f1064..21d50dfe 100644
--- a/miso.cabal
+++ b/miso.cabal
@@ -1,5 +1,5 @@
 name:                miso
-version:             0.3.0.0
+version:             0.4.0.0
 category:            Web, Miso, Data Structures
 license:             BSD3
 license-file:        LICENSE