diff --git a/README.md b/README.md
index ade66a3..d17cd7c 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,6 @@
 Different parameters can be configured:
 * **Dashboard name** (required): name of the dashboard you are about to create
 * **Projects prefix** (optional): prefix of the projects you want to import, i.e.: to import all the projects under the Gerrit namespace, you can specify `gerrit/`. *Note: It is not a regular expression.*
-* **Aggregation type** (required): the data can be aggregated by `email only`, by `email per hour`, by `email per day`, by `email per month` or by `email per year`.
 * **Date time-frame** (optional): time window you want to collect data about
 * **Username/Password** (optional): credentials for Gerrit API, if basic auth is needed
 
diff --git a/resources/wizard.png b/resources/wizard.png
index 3f37b7a..6a9d42a 100644
--- a/resources/wizard.png
+++ b/resources/wizard.png
Binary files differ
diff --git a/src/main/resources/static/analytics-dashboard.html b/src/main/resources/static/analytics-dashboard.html
index c0f0584..3488804 100644
--- a/src/main/resources/static/analytics-dashboard.html
+++ b/src/main/resources/static/analytics-dashboard.html
@@ -35,20 +35,6 @@
         <div class="col-lg-3">
             <input data-toggle="tooltip" title="Prefix of the projects to import, not a regular expression. I.e.: the 'gerrit/' prefix will import all the projects starting with 'gerrit/'" id="input-project-prefix" type="text">
         </div>
-        <div class="col-lg-4">
-            <div class="dropdown">
-                <button class="btn btn-primary dropdown-toggle" type="button" id="aggregate" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true">
-                    Aggregation type
-                </button>
-                <ul class="dropdown-menu" aria-labelledby="aggregate">
-                    <li><a href="#" data-value="email_hour">Author per hour</a></li>
-                    <li><a href="#" data-value="email_day">Author per day</a></li>
-                    <li><a href="#" data-value="email_month">Author per month</a></li>
-                    <li><a href="#" data-value="email_year">Author per year</a></li>
-                    <li><a href="#" data-value="email">Author Only</a></li><span class="caret"></span>
-                </ul>
-            </div>
-        </div>
 
     </div>
     <hr>
diff --git a/src/main/resources/static/js/analyticswizard.js b/src/main/resources/static/js/analyticswizard.js
index 3407b07..0ebe663 100644
--- a/src/main/resources/static/js/analyticswizard.js
+++ b/src/main/resources/static/js/analyticswizard.js
@@ -92,7 +92,7 @@
 
 function getRequestBody() {
   var etlConfigRaw = {
-    aggregate: $("#aggregate").val(),
+    aggregate: "email_hour",
     since: $("#since").val(),
     until: $("#until").val(),
     project_prefix: $("#input-project-prefix").val(),