diff --git a/ocd_backend/requirements.txt b/ocd_backend/requirements.txt
index de503cb..c486848 100644
--- a/ocd_backend/requirements.txt
+++ b/ocd_backend/requirements.txt
@@ -1,6 +1,6 @@
 -e git+https://github.com/mikeboers/PyAV.git@34d568f924e7dbb49a6f337e7791204c64fd8c52#egg=av
 Pillow>=6.2.0
-lxml==3.3.5
+lxml==4.9.1
 celery==3.1.26.post2
 redis==2.10.6
 elasticsearch>=5.0.0,<6.0.0