diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3130326bc..ecd9ec377 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,12 @@
+# v5.13 2021-03-28 Wekan release
+
+This release fixes the following bugs:
+
+- [Fixed Sandstorm Wekan attachments upload](https://github.com/wekan/wekan/commit/d4a1611b86521cd5913277cfa2c86c43958eec7b).
+  Thanks to xet7.
+
+Thanks to above GitHub users for their contributions and translators for their translations.
+
 # v5.12 2021-03-28 Wekan release
 
 This release fixes the following bugs:
diff --git a/Stackerfile.yml b/Stackerfile.yml
index dd796208d..b5c76d7bd 100644
--- a/Stackerfile.yml
+++ b/Stackerfile.yml
@@ -1,5 +1,5 @@
 appId: wekan-public/apps/77b94f60-dec9-0136-304e-16ff53095928
-appVersion: "v5.12.0"
+appVersion: "v5.13.0"
 files:
   userUploads:
     - README.md
diff --git a/package-lock.json b/package-lock.json
index 1b54e2fab..4940ff2fc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "wekan",
-  "version": "v5.12.0",
+  "version": "v5.13.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 260885a8b..93ab2ba40 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "wekan",
-  "version": "v5.12.0",
+  "version": "v5.13.0",
   "description": "Open-Source kanban",
   "private": true,
   "scripts": {
diff --git a/public/api/wekan.html b/public/api/wekan.html
index 28c6d6d1a..797c99c9b 100644
--- a/public/api/wekan.html
+++ b/public/api/wekan.html
@@ -7,7 +7,7 @@
     <meta charset="utf-8">
     <meta content="IE=edge,chrome=1" http-equiv="X-UA-Compatible">
     <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
-    <title>Wekan REST API v5.12</title>
+    <title>Wekan REST API v5.13</title>
 
     <style>
     </style>
@@ -1549,7 +1549,7 @@ 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 v5.12">Wekan REST API v5.12</a>
+            <a href="#wekan-rest-api" class="toc-h1 toc-link" data-title="Wekan REST API v5.13">Wekan REST API v5.13</a>
             
           </li>
         
@@ -2092,7 +2092,7 @@ 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 v5.12</h1>
+        <h1 id="wekan-rest-api">Wekan REST API v5.13</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 9114ec511..0e9454c88 100644
--- a/public/api/wekan.yml
+++ b/public/api/wekan.yml
@@ -1,7 +1,7 @@
 swagger: '2.0'
 info:
   title: Wekan REST API
-  version: v5.12
+  version: v5.13
   description: |
     The REST API allows you to control and extend Wekan with ease.
 
diff --git a/sandstorm-pkgdef.capnp b/sandstorm-pkgdef.capnp
index 822a859cb..1c31be429 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 = 512,
+    appVersion = 513,
     # Increment this for every release.
 
-    appMarketingVersion = (defaultText = "5.12.0~2021-03-28"),
+    appMarketingVersion = (defaultText = "5.13.0~2021-03-28"),
     # Human-readable presentation of the app version.
 
     minUpgradableAppVersion = 0,