diff --git a/requirements.txt b/requirements.txt
index a76079bc..83ebb21d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,6 +9,7 @@ libsass
 django-compressor
 django-sass-processor
 django-rq
+simple_history  # no longer used but kept for migration code which is used by tests
 django-auditlog @ git+https://github.com/jazzband/django-auditlog.git@45591463e8192b4ac0095e259cc4dcea0ac2fd6c
 django-hijack
 django-user-messages