diff --git a/certbot/certbot/compat/filesystem.py b/certbot/certbot/compat/filesystem.py
index b49824f8d..65bb53f38 100644
--- a/certbot/certbot/compat/filesystem.py
+++ b/certbot/certbot/compat/filesystem.py
@@ -263,7 +263,7 @@ def replace(src, dst):
     :param str dst: The new file path.
     """
     if hasattr(os, 'replace'):
-        # Use replace if possible. On Windows, only Python >= 3.4 is supported
+        # Use replace if possible. On Windows, only Python >= 3.5 is supported
         # so we can assume that os.replace() is always available for this platform.
         getattr(os, 'replace')(src, dst)
     else:
diff --git a/certbot/docs/contributing.rst b/certbot/docs/contributing.rst
index e1289c849..4ac266ed8 100644
--- a/certbot/docs/contributing.rst
+++ b/certbot/docs/contributing.rst
@@ -583,7 +583,7 @@ OS-level dependencies can be installed like so:
 In general...
 
 * ``sudo`` is required as a suggested way of running privileged process
-* `Python`_ 2.7 or 3.4+ is required
+* `Python`_ 2.7 or 3.5+ is required
 * `Augeas`_ is required for the Python bindings
 * ``virtualenv`` is used for managing other Python library dependencies
 
diff --git a/certbot/docs/install.rst b/certbot/docs/install.rst
index d21242367..11994776c 100644
--- a/certbot/docs/install.rst
+++ b/certbot/docs/install.rst
@@ -28,7 +28,7 @@ your system.
 System Requirements
 ===================
 
-Certbot currently requires Python 2.7 or 3.4+ running on a UNIX-like operating
+Certbot currently requires Python 2.7 or 3.5+ running on a UNIX-like operating
 system. By default, it requires root access in order to write to
 ``/etc/letsencrypt``, ``/var/log/letsencrypt``, ``/var/lib/letsencrypt``; to
 bind to port 80 (if you use the ``standalone`` plugin) and to read and