diff --git a/requirements.txt b/requirements.txt
index 27127c70862..96736e9917d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,11 +3,14 @@ decorator==4.0.10
 docutils==0.12
 ebaysdk==2.1.5
 feedparser==5.2.1
-gevent==1.1.2 ; sys_platform != 'win32'
-greenlet==0.4.10
+gevent==1.1.2 ; sys_platform != 'win32' and python_version < '3.7'
+gevent==1.3.4 ; sys_platform != 'win32' and python_version >= '3.7'
+greenlet==0.4.10 ; python_version < '3.7'
+greenlet==0.4.13 ; python_version >= '3.7'
 html2text==2016.9.19
 Jinja2==2.8
-lxml==3.7.1 ; sys_platform != 'win32'
+lxml==3.7.1 ; sys_platform != 'win32' and python_version < '3.7'
+lxml==4.2.3 ; sys_platform != 'win32' and python_version >= '3.7'
 lxml ; sys_platform == 'win32'
 Mako==1.0.4
 MarkupSafe==0.23