diff --git a/src/requirements/celery.txt b/src/requirements/celery.txt
index dc922d80b8..0a80f9d4f7 100644
--- a/src/requirements/celery.txt
+++ b/src/requirements/celery.txt
@@ -1,2 +1,5 @@
 celery>=3.1,<3.2
+# until the following issue is fixed, we need our own celery version
+# https://github.com/celery/celery/pull/3199
+git+https://github.com/pretix/celery.git@pretix#egg=celery
 
diff --git a/src/requirements/redis.txt b/src/requirements/redis.txt
index 21f0af4864..877ecc994f 100644
--- a/src/requirements/redis.txt
+++ b/src/requirements/redis.txt
@@ -1,4 +1,5 @@
 django-redis>=4.1,<4.2
 redis>=2.10,<2.11
 # until the following issue is fixed, we need our own kombu version
+# https://github.com/celery/kombu/pull/590
 git+https://github.com/pretix/kombu.git@pretix#egg=kombu