diff --git a/doc/installation.rst b/doc/installation.rst
index 0c90d4188..bc06a3389 100644
--- a/doc/installation.rst
+++ b/doc/installation.rst
@@ -9,6 +9,13 @@ You will need a Server to perform well with at least:
 * CPU: 2
 * RAM: 2GB
 * Disk: 10GB
+* Python 3
+
+.. note:: **👀 Heads up for modoboa versions 1.15 and later**
+   
+   Python 2 support has been dropped with modoboa version 1.15. 
+   If you still have Python 2 installed on your system either uninstall it 
+   or force modoboa user to run with Python 3.
 
 Recommended way
 ===============
diff --git a/requirements.txt b/requirements.txt
index 7c8eee58b..7f3361119 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ bcrypt  # Requires libffi-dev and python-dev
 
 dnspython==1.16.0
 feedparser==5.2.1
-gevent==1.4.0
+gevent==1.5.0
 jsonfield==2.0.2
 Pillow  # Optional dependency for django-ckeditor
 progressbar33==2.4