diff --git a/fet2020/requirements.txt b/fet2020/requirements.txt
index cf84d696..591849a2 100644
--- a/fet2020/requirements.txt
+++ b/fet2020/requirements.txt
@@ -11,3 +11,4 @@ etherpad-lite==0.5
 ldap3==2.8.1
 mysqlclient==2.0.1
 Pillow==7.2.0
+ghostscript==0.6