diff --git a/setup.py b/setup.py
index 2ac7a193d..297891545 100644
--- a/setup.py
+++ b/setup.py
@@ -51,9 +51,9 @@ requires = [
     'Pygments>=2.0',
     'docutils>=0.11',
     'snowballstemmer>=1.1',
-    'babel',
-    'alabaster',
-    'sphinx_rtd_theme',
+    'babel>=1.3',
+    'alabaster>=0.7,<0.8',
+    'sphinx_rtd_theme>=0.1,<0.2',
 ]
 extras_require = {
     # Environment Marker works for wheel 0.24 or later