diff --git a/requirements.txt b/requirements.txt
index 946cf442..e116de5f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ raven==5.1.1
 bleach==1.4
 django-ipware==0.1.0
 premailer==2.8.1
-django-transactional-cleanup==0.1.14
+django-transactional-cleanup==0.1.15
 lxml==3.4.1
 git+https://github.com/Xof/django-pglocks.git@dbb8d7375066859f897604132bd437832d2014ea
 pyjwkest==1.0.3
diff --git a/taiga/projects/attachments/__init__.py b/taiga/projects/attachments/__init__.py
index e69de29b..fcc59d48 100644
--- a/taiga/projects/attachments/__init__.py
+++ b/taiga/projects/attachments/__init__.py
@@ -0,0 +1,17 @@
+# Copyright (C) 2014 Andrey Antukh <niwi@niwi.be>
+# Copyright (C) 2014 Jesús Espino <jespinog@gmail.com>
+# Copyright (C) 2014 David Barragán <bameda@dbarragan.com>
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+default_app_config = "taiga.projects.attachments.apps.AttachmentsAppConfig"
diff --git a/taiga/projects/attachments/apps.py b/taiga/projects/attachments/apps.py
new file mode 100644
index 00000000..a4497463
--- /dev/null
+++ b/taiga/projects/attachments/apps.py
@@ -0,0 +1,38 @@
+# Copyright (C) 2014 Andrey Antukh <niwi@niwi.be>
+# Copyright (C) 2014 Jesús Espino <jespinog@gmail.com>
+# Copyright (C) 2014 David Barragán <bameda@dbarragan.com>
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from easy_thumbnails.files import get_thumbnailer
+
+from django.apps import AppConfig
+from django.apps import apps
+from django_transactional_cleanup.signals import cleanup_post_delete
+
+
+def thumbnail_delete(**kwargs):
+    thumbnailer = get_thumbnailer(kwargs["file"])
+    thumbnailer.delete_thumbnails()
+
+
+def connect_attachment_signals():
+    cleanup_post_delete.connect(thumbnail_delete)
+
+
+class AttachmentsAppConfig(AppConfig):
+    name = "taiga.projects.attachments"
+    verbose_name = "Attachments"
+
+    def ready(self):
+        connect_attachment_signals()