diff --git a/requirements.txt b/requirements.txt
index 0ef58c5..e7ab629 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ chardet==3.0.4
 future==0.16.0
 httplib2==0.11.3
 idna==2.6
-lxml==4.2.1
+lxml==4.6.2
 oauth2==1.9.0.post1
 requests==2.18.4
 urllib3==1.22
diff --git a/setup.py b/setup.py
old mode 100755
new mode 100644
index 4973b81..a345dfa
--- a/setup.py
+++ b/setup.py
@@ -15,7 +15,7 @@
 requirements = [
     'future',
     'httplib2>=0.9',
-    'lxml>=3.4,<=4',
+    'lxml>=3.4,<5',
     'oauth2>=1.9,<2',
     'requests>=2.7,<3',
 ]