diff --git a/docs/requirements.txt b/docs/requirements.txt
index 4170c03efd128125d51c2e96f238a6e9b8b8368f..edabd76fdeb699b456a183105940aaf7c786f84e 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1 +1,6 @@
-sphinx-rtd-theme
\ No newline at end of file
+sphinx-rtd-theme
+numpy
+scipy
+scikit-image
+matplotlib
+SimpleITK
\ No newline at end of file