diff --git a/passbook/api/requirements.txt b/passbook/api/requirements.txt
index bb6939fda..b71855af2 100644
--- a/passbook/api/requirements.txt
+++ b/passbook/api/requirements.txt
@@ -1,3 +1,3 @@
-djangorestframework42
+djangorestframework==3.9.4
 drf_yasg
 django-filters