diff --git a/docs/requirements.txt b/docs/requirements.txt
index 08e80edd6..5f27c38e7 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,4 +1,5 @@
 Cython
+cmake
 numpy
 scipy
-scikit-learn
\ No newline at end of file
+scikit-learn