diff --git a/doc/system_hooks/system_hooks.md b/doc/system_hooks/system_hooks.md
index ad5ffc84473..583ec5522fd 100644
--- a/doc/system_hooks/system_hooks.md
+++ b/doc/system_hooks/system_hooks.md
@@ -266,7 +266,8 @@ X-Gitlab-Event: System Hook
 
 ## Push events
 
-Triggered when you push to the repository except when pushing tags.
+Triggered when you push to the repository, except when pushing tags.
+It generates one event per modified branch.
 
 **Request header**:
 
@@ -332,6 +333,7 @@ X-Gitlab-Event: System Hook
 ## Tag events
 
 Triggered when you create (or delete) tags to the repository.
+It generates one event per modified tag.
 
 **Request header**:
 
@@ -381,3 +383,49 @@ X-Gitlab-Event: System Hook
   "total_commits_count": 0
 }
 ```
+## Repository Update events
+
+Triggered only once when you push to the repository (including tags).
+
+**Request header**:
+
+```
+X-Gitlab-Event: System Hook
+```
+
+**Request body:**
+
+```json
+{
+  "event_name": "repository_update",
+  "user_id": 1,
+  "user_name": "John Smith",
+  "user_email": "admin@example.com",
+  "user_avatar": "https://s.gravatar.com/avatar/d4c74594d841139328695756648b6bd6?s=8://s.gravatar.com/avatar/d4c74594d841139328695756648b6bd6?s=80",
+  "project_id": 1,
+  "project": {
+    "name":"Example",
+    "description":"",
+    "web_url":"http://example.com/jsmith/example",
+    "avatar_url":null,
+    "git_ssh_url":"git@example.com:jsmith/example.git",
+    "git_http_url":"http://example.com/jsmith/example.git",
+    "namespace":"Jsmith",
+    "visibility_level":0,
+    "path_with_namespace":"jsmith/example",
+    "default_branch":"master",
+    "homepage":"http://example.com/jsmith/example",
+    "url":"git@example.com:jsmith/example.git",
+    "ssh_url":"git@example.com:jsmith/example.git",
+    "http_url":"http://example.com/jsmith/example.git",
+  },
+  "changes": [
+    {
+      "before":"8205ea8d81ce0c6b90fbe8280d118cc9fdad6130",
+      "after":"4045ea7a3df38697b3730a20fb73c8bed8a3e69e",
+      "ref":"refs/heads/master"
+    }
+  ],
+  "refs":["refs/heads/master"]
+}
+```