diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5e6bc2414..34ec49ad3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,13 @@
+# v4.00 2020-04-27 Wekan release
+
+This release fixes the following bugs:
+
+- [Make sure that the board header buttons fit into one line even for devices with 360px width
+  resolution](https://github.com/wekan/wekan/pull/3052).
+  Thanks to marc1006.
+
+Thanks to above GitHub users for their contributions and translators for their translations.
+
 # v3.99 2020-04-27 Wekan release
 
 This release fixes the following bugs:
diff --git a/Stackerfile.yml b/Stackerfile.yml
index b4377f2aa..8dae18fce 100644
--- a/Stackerfile.yml
+++ b/Stackerfile.yml
@@ -1,5 +1,5 @@
 appId: wekan-public/apps/77b94f60-dec9-0136-304e-16ff53095928
-appVersion: "v3.99.0"
+appVersion: "v4.00.0"
 files:
   userUploads:
     - README.md
diff --git a/package-lock.json b/package-lock.json
index 07507ffe7..99c506d44 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "wekan",
-  "version": "v3.99.0",
+  "version": "v4.00.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index d6c8397c3..2d9e225a9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "wekan",
-  "version": "v3.99.0",
+  "version": "v4.00.0",
   "description": "Open-Source kanban",
   "private": true,
   "scripts": {
diff --git a/public/api/wekan.html b/public/api/wekan.html
index d95b6684d..49cf0b3b2 100644
--- a/public/api/wekan.html
+++ b/public/api/wekan.html
@@ -1524,7 +1524,7 @@ var n=this.pipeline.run(e.tokenizer(t)),r=new e.Vector,i=[],o=this._fields.reduc
 	  	<ul class="toc-list-h1">
 
           <li>
-            <a href="#wekan-rest-api" class="toc-h1 toc-link" data-title="Wekan REST API v3.99">Wekan REST API v3.99</a>
+            <a href="#wekan-rest-api" class="toc-h1 toc-link" data-title="Wekan REST API v4.00">Wekan REST API v4.00</a>
 
           </li>
 
@@ -1904,7 +1904,7 @@ var n=this.pipeline.run(e.tokenizer(t)),r=new e.Vector,i=[],o=this._fields.reduc
     <div class="page-wrapper">
       <div class="dark-box"></div>
       <div class="content">
-        <h1 id="wekan-rest-api">Wekan REST API v3.99</h1>
+        <h1 id="wekan-rest-api">Wekan REST API v4.00</h1>
 <blockquote>
 <p>Scroll down for code samples, example requests and responses. Select a language for code samples from the tabs above or the mobile navigation menu.</p>
 </blockquote>
diff --git a/public/api/wekan.yml b/public/api/wekan.yml
index 5e2cf0f51..e17e19632 100644
--- a/public/api/wekan.yml
+++ b/public/api/wekan.yml
@@ -1,7 +1,7 @@
 swagger: '2.0'
 info:
   title: Wekan REST API
-  version: v3.99
+  version: v4.00
   description: |
     The REST API allows you to control and extend Wekan with ease.
 
diff --git a/sandstorm-pkgdef.capnp b/sandstorm-pkgdef.capnp
index c77937bb7..bc42b98fe 100644
--- a/sandstorm-pkgdef.capnp
+++ b/sandstorm-pkgdef.capnp
@@ -22,10 +22,10 @@ const pkgdef :Spk.PackageDefinition = (
     appTitle = (defaultText = "Wekan"),
     # The name of the app as it is displayed to the user.
 
-    appVersion = 399,
+    appVersion = 400,
     # Increment this for every release.
 
-    appMarketingVersion = (defaultText = "3.99.0~2020-04-27"),
+    appMarketingVersion = (defaultText = "4.00.0~2020-04-27"),
     # Human-readable presentation of the app version.
 
     minUpgradableAppVersion = 0,