diff --git a/dev-docs/bidders/adquery.md b/dev-docs/bidders/adquery.md
index 8ab327d42b..fd1419c80c 100644
--- a/dev-docs/bidders/adquery.md
+++ b/dev-docs/bidders/adquery.md
@@ -8,6 +8,7 @@ gdpr_supported: true
 usp_supported: true
 schain_supported: true
 gvl_id: 902
+userIds: adQuery QiD
 ---
 
 ### Bid Params
diff --git a/dev-docs/modules/userId.md b/dev-docs/modules/userId.md
index 92cb9fc8a3..ec57a49bbd 100644
--- a/dev-docs/modules/userId.md
+++ b/dev-docs/modules/userId.md
@@ -80,7 +80,7 @@ The table below has the options that are common across ID systems. See the secti
 {: .table .table-bordered .table-striped }
 | Param under userSync.userIds[] | Scope | Type | Description | Example |
 | --- | --- | --- | --- | --- |
-| name | Required | String | May be: `"admixerId"`, `"adtelligentId"`, `"akamaiDAPId"`, `"amxId"`, `"britepoolId"`, `"criteo"`, `"fabrickId"`, `"flocId"`, `"hadronId"`, `"id5id"`, `identityLink`, `"idx"`, `"intentIqId"`, `"justId"`, `"liveIntentId"`, `"lotamePanoramaId"`, `"merkleId"`, `"naveggId"`, `"mwOpenLinkId"`, `"netId"`, `"novatiqId"`, `"parrableId"`, `"quantcastId"`, `"pubProvidedId"`, `"sharedId"`, `"tapadId"`, `"unifiedId"`,`"uid2"`, `"verizonMediaId"`, `"zeotapIdPlus"` | `"unifiedId"`
+| name | Required | String | May be: `"admixerId"`, `"qid"`, `"adtelligentId"`, `"akamaiDAPId"`, `"amxId"`, `"britepoolId"`, `"criteo"`, `"fabrickId"`, `"flocId"`, `"hadronId"`, `"id5id"`, `identityLink`, `"idx"`, `"intentIqId"`, `"justId"`, `"liveIntentId"`, `"lotamePanoramaId"`, `"merkleId"`, `"naveggId"`, `"mwOpenLinkId"`, `"netId"`, `"novatiqId"`, `"parrableId"`, `"quantcastId"`, `"pubProvidedId"`, `"sharedId"`, `"tapadId"`, `"unifiedId"`,`"uid2"`, `"verizonMediaId"`, `"zeotapIdPlus"` | `"unifiedId"`
 | params | Based on User ID sub-module | Object | | |
 | bidders | Optional | Array of Strings | An array of bidder codes to which this user ID may be sent. | `['bidderA', 'bidderB']` |
 | storage | Optional | Object | The publisher can specify some kind of local storage in which to store the results of the call to get the user ID. This can be either cookie or HTML5 storage. This is not needed when `value` is specified or the ID system is managing its own storage | |
@@ -236,6 +236,43 @@ gulp build --modules=admixerIdSystem
    });
 {% endhighlight %}
 
+### adQuery QiD
+
+The adQuery QiD is a first-party identifier designed for publishers using the Adquery adapter. For more information please contact [prebid@adquery.io](prebid@adquery.io)
+
+#### adQuery QiD Configuration
+
+First, add the adQuery QiD module to your Prebid.js build:
+
+```shell
+gulp build --modules=userId,adqueryIdSystem
+```
+
+Then configure the qui in your `userSync` configuration:
+
+```javascript
+pbjs.setConfig({
+    userSync: {
+        userIds: [{
+            name: 'qid',
+            storage: {
+                name: 'qid',
+                type: 'html5',
+                expires: 365,
+            }
+        }]
+    }
+});
+```
+
+This will add a `userId.qid` property to all bidRequests. This will be read by the Adquery bid adapter, and any other adapters that support EIDs:
+
+```javascript
+{
+  qid: 'p9v2dpnuckkzhuc92i'
+}
+```
+
 ### Adtelligent
 
 The [Adtelligent](https://adtelligent.com) ID system is a unique per-session user identifier for providing high quality DMP data for advertisers
@@ -2215,6 +2252,7 @@ Bidders that want to support the User ID module in Prebid.js, need to update the
 | ID System Name | ID System Host | Prebid.js Attr: bidRequest.userId. | EID Source | Example Value |
 | --- | --- | --- | --- | --- | --- | --- |
 | Admixer ID | Admixer | admixerId | admixer.net | "1111" |
+| adQuery QiD | adQuery | qid | adquery.io | "p9v2dpnuckkzhuc..." |
 | Adtelligent ID | Adtelligent | bidRequest.userId.adtelligentId | `"1111"` |
 | Akamai DAP ID | Akamai DAP | dapId | akamai.com | "eyJhbGciOiJka....YIsj7"|
 | AMX RTB ID | AMX RTB | amxId | amxrtb.com | "3ca11058-..." |
diff --git a/download.md b/download.md
index 5958da158c..51e281b89a 100644
--- a/download.md
+++ b/download.md
@@ -249,6 +249,9 @@ These modules may require accounts with a service provider.<br/>
   <label><input type="checkbox" moduleCode="admixerIdSystem" class="bidder-check-box"> Admixer ID</label>
   </div></div>
   <div class="col-md-4"><div class="checkbox">
+  <label><input type="checkbox" moduleCode="adqueryIdSystem" class="bidder-check-box"> adQuery QiD</label>
+  </div></div>
+  <div class="col-md-4"><div class="checkbox">
   <label><input type="checkbox" moduleCode="amxIdSystem" class="bidder-check-box"> AMX RTB ID</label>
   </div></div>
   <div class="col-md-4"><div class="checkbox">