diff --git a/requirements-dev.pip b/requirements-dev.pip
index 85211981c432378064d8ddd59f612d087a06a2d9..67caa2415dccb8ca41123a036f0e606d547b4c1d 100644
--- a/requirements-dev.pip
+++ b/requirements-dev.pip
@@ -3,7 +3,7 @@ wheel
 twine
 docutils<0.18
 nose2
-pyflakes==2.1.0
-pylint==2.2.2
-sphinx==1.8.4
-sphinx-rtd-theme==0.4.2
+pyflakes
+pylint
+sphinx
+sphinx-rtd-theme