diff --git a/requirements.txt b/requirements.txt
index e62addb..b249ff8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -51,7 +51,7 @@ jupyter-core==4.4.0
 llvmlite==0.25.0
 locket==0.2.0
 logzero==1.5.0
-lxml==4.2.5
+lxml==4.6.2
 MarkupSafe==1.0
 mistune==0.8.4
 mkl-fft==1.0.6