diff --git a/.sandstorm-meteor-1.8/package-lock.json b/.sandstorm-meteor-1.8/package-lock.json
index 4431ebb29..68140106f 100644
--- a/.sandstorm-meteor-1.8/package-lock.json
+++ b/.sandstorm-meteor-1.8/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "wekan",
-  "version": "v3.90.0",
+  "version": "v3.91.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/.sandstorm-meteor-1.8/package.json b/.sandstorm-meteor-1.8/package.json
index 4cbbb0c86..17743bc14 100644
--- a/.sandstorm-meteor-1.8/package.json
+++ b/.sandstorm-meteor-1.8/package.json
@@ -1,6 +1,6 @@
 {
   "name": "wekan",
-  "version": "v3.90.0",
+  "version": "v3.91.0",
   "description": "Open-Source kanban",
   "private": true,
   "scripts": {
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 04e20bbce..ccce946b3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-# Upcoming Wekan release
+# v3.91 2020-04-08 Wekan release
 
 This release adds the following new features:
 
diff --git a/Stackerfile.yml b/Stackerfile.yml
index 48a033a4f..f51df6f24 100644
--- a/Stackerfile.yml
+++ b/Stackerfile.yml
@@ -1,5 +1,5 @@
 appId: wekan-public/apps/77b94f60-dec9-0136-304e-16ff53095928
-appVersion: "v3.90.0"
+appVersion: "v3.91.0"
 files:
   userUploads:
     - README.md
diff --git a/package-lock.json b/package-lock.json
index 06cb5f86d..ae10aa04b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "wekan",
-  "version": "v3.90.0",
+  "version": "v3.91.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index d6411ffce..d2269d504 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "wekan",
-  "version": "v3.90.0",
+  "version": "v3.91.0",
   "description": "Open-Source kanban",
   "private": true,
   "scripts": {
diff --git a/public/api/wekan.html b/public/api/wekan.html
index 1256c2517..e370e9bca 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 v3.90">Wekan REST API v3.90</a>
+            <a href="#wekan-rest-api" class="toc-h1 toc-link" data-title="Wekan REST API v3.91">Wekan REST API v3.91</a>
             
           </li>
         
@@ -1937,6 +1937,11 @@ var n=this.pipeline.run(e.tokenizer(t)),r=new e.Vector,i=[],o=this._fields.reduc
                     
                   </li>
                 
+                  <li>
+                    <a href="#tocscardsvote" class="toc-h2 toc-link" data-title="CardsVote">CardsVote</a>
+                    
+                  </li>
+                
                   <li>
                     <a href="#tocscardscustomfields" class="toc-h2 toc-link" data-title="CardsCustomfields">CardsCustomfields</a>
                     
@@ -2017,7 +2022,7 @@ 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 v3.90</h1>
+        <h1 id="wekan-rest-api">Wekan REST API v3.91</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>
@@ -14376,7 +14381,17 @@ UserSecurity
   <span class="hljs-attr">"sort"</span>: <span class="hljs-number">0</span>,
   <span class="hljs-attr">"subtaskSort"</span>: <span class="hljs-number">0</span>,
   <span class="hljs-attr">"type"</span>: <span class="hljs-string">"string"</span>,
-  <span class="hljs-attr">"linkedId"</span>: <span class="hljs-string">"string"</span>
+  <span class="hljs-attr">"linkedId"</span>: <span class="hljs-string">"string"</span>,
+  <span class="hljs-attr">"vote"</span>: {
+    <span class="hljs-attr">"question"</span>: <span class="hljs-string">"string"</span>,
+    <span class="hljs-attr">"positive"</span>: [
+      <span class="hljs-string">"string"</span>
+    ],
+    <span class="hljs-attr">"negative"</span>: [
+      <span class="hljs-string">"string"</span>
+    ],
+    <span class="hljs-attr">"end"</span>: <span class="hljs-string">"string"</span>
+  }
 }
 
 </code></pre>
@@ -14595,6 +14610,13 @@ UserSecurity
 <td>none</td>
 <td>ID of the linked card</td>
 </tr>
+<tr>
+<td>vote</td>
+<td><a href="#schemacardsvote">CardsVote</a></td>
+<td>false</td>
+<td>none</td>
+<td>vote object, see below</td>
+</tr>
 </tbody>
 </table>
 <h4 id="enumerated-values">Enumerated Values</h4>
@@ -14708,6 +14730,62 @@ UserSecurity
 </tr>
 </tbody>
 </table>
+<h2 id="tocscardsvote">CardsVote</h2>
+<p><a id="schemacardsvote"></a></p>
+<pre class="highlight tab tab-json"><code>{
+  <span class="hljs-attr">"question"</span>: <span class="hljs-string">"string"</span>,
+  <span class="hljs-attr">"positive"</span>: [
+    <span class="hljs-string">"string"</span>
+  ],
+  <span class="hljs-attr">"negative"</span>: [
+    <span class="hljs-string">"string"</span>
+  ],
+  <span class="hljs-attr">"end"</span>: <span class="hljs-string">"string"</span>
+}
+
+</code></pre>
+<h3 id="properties">Properties</h3>
+<table>
+<thead>
+<tr>
+<th>Name</th>
+<th>Type</th>
+<th>Required</th>
+<th>Restrictions</th>
+<th>Description</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td>question</td>
+<td>string</td>
+<td>true</td>
+<td>none</td>
+<td>none</td>
+</tr>
+<tr>
+<td>positive</td>
+<td>[string]</td>
+<td>false</td>
+<td>none</td>
+<td>list of members (user IDs)</td>
+</tr>
+<tr>
+<td>negative</td>
+<td>[string]</td>
+<td>false</td>
+<td>none</td>
+<td>list of members (user IDs)</td>
+</tr>
+<tr>
+<td>end</td>
+<td>string</td>
+<td>false</td>
+<td>none</td>
+<td>none</td>
+</tr>
+</tbody>
+</table>
 <h2 id="tocscardscustomfields">CardsCustomfields</h2>
 <p><a id="schemacardscustomfields"></a></p>
 <pre class="highlight tab tab-json"><code>{}
diff --git a/public/api/wekan.yml b/public/api/wekan.yml
index 003c260f6..739e37425 100644
--- a/public/api/wekan.yml
+++ b/public/api/wekan.yml
@@ -1,7 +1,7 @@
 swagger: '2.0'
 info:
   title: Wekan REST API
-  version: v3.90
+  version: v3.91
   description: |
     The REST API allows you to control and extend Wekan with ease.
 
@@ -2523,6 +2523,11 @@ definitions:
            ID of the linked card
         type: string
         x-nullable: true
+      vote:
+        description: |
+           vote object, see below
+        $ref: "#/definitions/CardsVote"
+        x-nullable: true
     required:
       - archived
       - swimlaneId
@@ -2532,6 +2537,29 @@ definitions:
       - userId
       - sort
       - type
+  CardsVote:
+    type: object
+    properties:
+      question:
+        type: string
+      positive:
+        description: |
+           list of members (user IDs)
+        type: array
+        items:
+          type: string
+          x-nullable: true
+      negative:
+        description: |
+           list of members (user IDs)
+        type: array
+        items:
+          type: string
+          x-nullable: true
+      end:
+        type: string
+    required:
+      - question
   CardsCustomfields:
     type: object
   ChecklistItems:
diff --git a/sandstorm-pkgdef.capnp b/sandstorm-pkgdef.capnp
index 65edd1dde..d1ed39678 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 = 390,
+    appVersion = 391,
     # Increment this for every release.
 
-    appMarketingVersion = (defaultText = "3.90.0~2020-04-06"),
+    appMarketingVersion = (defaultText = "3.91.0~2020-04-08"),
     # Human-readable presentation of the app version.
 
     minUpgradableAppVersion = 0,