diff --git a/requirements.txt b/requirements.txt
index afe1e60..82777ba 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 #scispacy
 #https://s3-us-west-2.amazonaws.com/ai2-s2-scispacy/releases/v0.2.4/en_core_sci_md-0.2.4.tar.gz
-lxml==4.3.0
+lxml==4.6.3
 numpy==1.16.2
 pandas==0.24.2
 scikit-learn==0.20.3