diff --git a/requirements-dev.txt b/requirements-dev.txt
index 4d46329c0a522fb4d79e2e2fb684134378f63502..189040f72557736e2cacd81bc6205ffdc044e286 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,6 +1,4 @@
 watchdog
-sphinx
-recommonmark
 gitpython
 mypy
 pylint
diff --git a/requirements.txt b/requirements.txt
index 7619c5106c00abda7c5e06eb97010095ca6f3c52..a3c79f14ec7233a2d426a748250deaf1274a4eca 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,3 +13,5 @@ numpy
 cython>=0.19
 spglib
 gunicorn
+sphinx
+recommonmark