diff --git a/python-requirements-full.txt b/python-requirements-full.txt
index 4ee92ce..3fba62d 100644
--- a/python-requirements-full.txt
+++ b/python-requirements-full.txt
@@ -5,7 +5,7 @@ coverage==4.0.3
 Cython==0.29.6
 html5lib==0.999999999
 idna==2.7
-lxml==3.8.0
+lxml==4.6.5
 nose==1.3.7
 numpy==1.16.2
 pandas==0.18.1
diff --git a/python-requirements.txt b/python-requirements.txt
old mode 100755
new mode 100644
index 588205f..23b284b
--- a/python-requirements.txt
+++ b/python-requirements.txt
@@ -1,7 +1,7 @@
 beautifulsoup4==4.6.0
 coverage==4.0.3
 html5lib==0.999999999
-lxml==3.8.0
+lxml==4.6.5
 pep8==1.7.0
 pandas==0.18.1
 pytest==3.2.1