diff --git a/.travis.yml b/.travis.yml
index 5e3daa3..0932316 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -30,7 +30,7 @@ matrix:
     - python: nightly
     - python: pypy3
 before_install:
-    - pip install tox codecov docutils==0.12
+    - pip install tox codecov 'sphinx>=1.5.1'
 script:
     - tox
     - codecov
diff --git a/doc/requirements.txt b/doc/requirements.txt
index 70b595d..682316c 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -4,4 +4,4 @@ qrcode>=4.0
 pyserial
 sphinx-rtd-theme
 setuptools-scm
-docutils==0.12
+docutils>=0.12
diff --git a/tox.ini b/tox.ini
index 5e32ebe..7c9e8ca 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,7 +16,6 @@ commands = py.test --cov escpos
 [testenv:docs]
 basepython = python
 changedir = doc
-deps = sphinx
+deps = sphinx>=1.5.1
        setuptools_scm
-       docutils==0.12
 commands = sphinx-build -W -b html -d {envtmpdir}/doctrees .  {envtmpdir}/html