diff --git a/setup.py b/setup.py
index c423278fa1..aaa4e6073e 100755
--- a/setup.py
+++ b/setup.py
@@ -75,8 +75,8 @@ testing_extras = [
 
 # Documentation dependencies
 documentation_extras = [
-    'pyenchant==1.6.8',
-    'sphinxcontrib-spelling>=2.3.0',
+    'pyenchant>=3.1.1,<4',
+    'sphinxcontrib-spelling>=5.4.0,<6',
     'Sphinx>=1.5.2',
     'sphinx-autobuild>=0.6.0',
     'sphinx_rtd_theme>=0.1.9',