diff --git a/app/observers/issue_observer.rb b/app/observers/issue_observer.rb
index b150e39e239..1575cf0f19f 100644
--- a/app/observers/issue_observer.rb
+++ b/app/observers/issue_observer.rb
@@ -13,6 +13,7 @@ class IssueObserver < BaseObserver
 
   def after_reopen(issue, transition)
     create_note(issue)
+    execute_hooks(issue)
   end
 
   def after_update(issue)
@@ -21,6 +22,7 @@ class IssueObserver < BaseObserver
     end
 
     issue.notice_added_references(issue.project, current_user)
+    execute_hooks(issue)
   end
 
   protected
diff --git a/app/observers/merge_request_observer.rb b/app/observers/merge_request_observer.rb
index 96492198111..0ac555fce7c 100644
--- a/app/observers/merge_request_observer.rb
+++ b/app/observers/merge_request_observer.rb
@@ -38,12 +38,14 @@ class MergeRequestObserver < ActivityObserver
   def after_reopen(merge_request, transition)
     create_event(merge_request, Event::REOPENED)
     create_note(merge_request)
+    execute_hooks(merge_request)
   end
 
   def after_update(merge_request)
     notification.reassigned_merge_request(merge_request, current_user) if merge_request.is_being_reassigned?
 
     merge_request.notice_added_references(merge_request.project, current_user)
+    execute_hooks(merge_request)
   end
 
   def create_event(record, status)
diff --git a/app/views/help/web_hooks.html.haml b/app/views/help/web_hooks.html.haml
index 66ab7b75bda..7bde7fcc3d0 100644
--- a/app/views/help/web_hooks.html.haml
+++ b/app/views/help/web_hooks.html.haml
@@ -61,7 +61,7 @@
 
   %h4.prepend-top-20 Issues events
   %p.light
-    Triggered when new issue created or existing issue was closed.
+    Triggered when new issue created or existing issue was updated/closed/reopened.
     %br
     Request body:
   = highlight_js do
@@ -86,7 +86,7 @@
       }
   %h4.prepend-top-20 Merge request events
   %p.light
-    Triggered when new merge request created or existing merge request was merged/closed.
+    Triggered when new merge request created or existing merge request was updated/merged/closed.
     %br
     Request body:
   = highlight_js do