diff --git a/.drone.yml b/.drone.yml
index ea6f70b7fc..48230a24cf 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -15,9 +15,9 @@ matrix:
     include:
         - IMAGE: python:2.7
           TOXENV: py27
-        - IMAGE: python:3.3
-          TOXENV: py33
         - IMAGE: python:3.4
           TOXENV: py34
         - IMAGE: python:3.5
           TOXENV: py35
+        - IMAGE: python:3.6
+          TOXENV: py36
diff --git a/setup.py b/setup.py
index e17376cf2d..d0cddc70c9 100644
--- a/setup.py
+++ b/setup.py
@@ -66,9 +66,9 @@ setup(name=name,
         'GNU Library or Lesser General Public License (LGPL)',
         'Operating System :: OS Independent',
         'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
         'Topic :: Office/Business',
diff --git a/tox.ini b/tox.ini
index ccb2d683b1..f86d242d11 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py33,py34,py35,pypy
+envlist = py27,py34,py35,py36,pypy
 
 [testenv]
 commands = {envpython} setup.py test