diff --git a/app/models/user.rb b/app/models/user.rb
index 43973425a4b..5d8672d60b3 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -825,7 +825,7 @@ class User < ActiveRecord::Base
     {
       name: name,
       username: username,
-      avatar_url: avatar_url
+      avatar_url: avatar_url(only_path: false)
     }
   end
 
diff --git a/changelogs/unreleased/34339-user_avatar-url-in-push-event-webhook-json-payload-is-relative-should-be-absolute.yml b/changelogs/unreleased/34339-user_avatar-url-in-push-event-webhook-json-payload-is-relative-should-be-absolute.yml
new file mode 100644
index 00000000000..13f28da8577
--- /dev/null
+++ b/changelogs/unreleased/34339-user_avatar-url-in-push-event-webhook-json-payload-is-relative-should-be-absolute.yml
@@ -0,0 +1,4 @@
+---
+title: Use full path of user's avatar in webhooks
+merge_request: 13401
+author: Vitaliy @blackst0ne Klachkov