diff --git a/Cargo.lock b/Cargo.lock
index 7882cb0..19d19b5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "ab_glyph"
@@ -3446,7 +3446,7 @@ checksum = "a183cf7feeba97b4dd1c0d46788634f6221d87fa961b305bed08c851829efcc0"
 
 [[package]]
 name = "uw8"
-version = "0.3.1"
+version = "0.4.0"
 dependencies = [
  "ansi_term",
  "anyhow",
diff --git a/Cargo.toml b/Cargo.toml
index cbbf27c..026b11c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "uw8"
-version = "0.3.1"
+version = "0.4.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
diff --git a/README.md b/README.md
index 216805a..9c58c23 100644
--- a/README.md
+++ b/README.md
@@ -15,9 +15,9 @@ See [here](https://exoticorn.github.io/microw8/) for more information and docs.
 
 ## Downloads
 
-* [Linux](https://github.com/exoticorn/microw8/releases/download/v0.3.0/microw8-0.3.0-linux.tgz)
-* [MacOS](https://github.com/exoticorn/microw8/releases/download/v0.3.0/microw8-0.3.0-macos.tgz)
-* [Windows](https://github.com/exoticorn/microw8/releases/download/v0.3.0/microw8-0.3.0-windows.zip)
+* [Linux](https://github.com/exoticorn/microw8/releases/download/v0.3.0/microw8-0.4.0-linux.tgz)
+* [MacOS](https://github.com/exoticorn/microw8/releases/download/v0.3.0/microw8-0.4.0-macos.tgz)
+* [Windows](https://github.com/exoticorn/microw8/releases/download/v0.3.0/microw8-0.4.0-windows.zip)
 
 The download includes
 
diff --git a/site/content/_index.md b/site/content/_index.md
index baa4bd6..60e36f5 100644
--- a/site/content/_index.md
+++ b/site/content/_index.md
@@ -31,19 +31,18 @@ Examplers for older versions:
 
 ## Versions
 
-### v0.3.0
+### v0.4.0
 
-* [Web runtime](v0.3.0)
-* [Linux](https://github.com/exoticorn/microw8/releases/download/v0.3.0/microw8-0.3.0-linux.tgz)
-* [MacOS](https://github.com/exoticorn/microw8/releases/download/v0.3.0/microw8-0.3.0-macos.tgz)
-* [Windows](https://github.com/exoticorn/microw8/releases/download/v0.3.0/microw8-0.3.0-windows.zip)
+* [Web runtime](../v0.4.0)
+* [Linux](https://github.com/exoticorn/microw8/releases/download/v0.4.0/microw8-0.4.0-linux.tgz)
+* [MacOS](https://github.com/exoticorn/microw8/releases/download/v0.4.0/microw8-0.4.0-macos.tgz)
+* [Windows](https://github.com/exoticorn/microw8/releases/download/v0.4.0/microw8-0.4.0-windows.zip)
 
 Changes:
 
-* add blitSprite and grabSprite API calls
-* add support for integer scaling up to 16x for printing text
-* fix incompatibility with sound devices only offering 16bit audio formats
-* add support for br_table instruction in packed carts
+* add support for sound on mono- and surround-only devices
+* update wasmtime dependency to fix performance regression in 0.3.0
+* add 6 and 7 parameter function types to base module
 
 ### Older versions
 
diff --git a/site/content/docs.md b/site/content/docs.md
index 1e9e224..372a819 100644
--- a/site/content/docs.md
+++ b/site/content/docs.md
@@ -594,7 +594,7 @@ a base module provided by MicroW8.
 
 You can generate this base module yourself using
 `uw8-tool`. As a quick summary, it provides all function
-types with up to 5 parameters (i32 or f32) where the
+types with up to 7 parameters (i32 or f32) where the
 `f32` parameters always preceed the `i32` parameters.
 Then it includes all imports that MicroW8 provides,
 a function section with a single function of type
diff --git a/site/content/versions.md b/site/content/versions.md
index f86c6eb..ea4b671 100644
--- a/site/content/versions.md
+++ b/site/content/versions.md
@@ -2,6 +2,19 @@
 description = "Versions"
 +++
 
+### v0.4.0
+
+* [Web runtime](../v0.4.0)
+* [Linux](https://github.com/exoticorn/microw8/releases/download/v0.4.0/microw8-0.4.0-linux.tgz)
+* [MacOS](https://github.com/exoticorn/microw8/releases/download/v0.4.0/microw8-0.4.0-macos.tgz)
+* [Windows](https://github.com/exoticorn/microw8/releases/download/v0.4.0/microw8-0.4.0-windows.zip)
+
+Changes:
+
+* add support for sound on mono- and surround-only devices
+* update wasmtime dependency to fix performance regression in 0.3.0
+* add 6 and 7 parameter function types to base module
+
 ### v0.3.0
 
 * [Web runtime](../v0.3.0)
diff --git a/site/templates/index.html b/site/templates/index.html
index 259eb01..b243e8b 100644
--- a/site/templates/index.html
+++ b/site/templates/index.html
@@ -4,7 +4,7 @@
         <section>
             <h1 class="text-center heading-text">A WebAssembly based fantasy console</h1>
         </section>
-        <a href="v0.3.0">
+        <a href="v0.4.0">
             <img class="demonstration-gif" style="width:640px;height:480px;image-rendering:pixelated" src="img/technotunnel.png"></img>
         </a>
     </div>