diff --git a/hedge_allocations/requirements.txt b/hedge_allocations/requirements.txt
index 07406028b..73662912e 100644
--- a/hedge_allocations/requirements.txt
+++ b/hedge_allocations/requirements.txt
@@ -78,7 +78,7 @@ lazy-object-proxy==1.2.2
 lightgbm==2.0.10
 llvmlite==0.25.0
 locket==0.2.0
-lxml==3.7.3
+lxml==4.6.2
 Mako==1.0.7
 Markdown==2.6.11
 MarkupSafe==0.23