diff --git a/requirements.txt b/requirements.txt
index 96b593c..9f32681 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-lxml==2.3.2
+lxml==4.9.2
 numpy==1.9.2
 pykml==0.1.0
 pyproj==1.9.4