diff --git a/requirements/edx/appsembler.txt b/requirements/edx/appsembler.txt
index aa26f94b956a..333b60de2cb0 100644
--- a/requirements/edx/appsembler.txt
+++ b/requirements/edx/appsembler.txt
@@ -8,3 +8,4 @@ psycopg2-binary==2.8.3
 django-hijack==2.1.10
 django-hijack-admin==2.1.10
 honeycomb-beeline==2.12.1
+xblock-problem-builder==4.1.8