diff --git a/.readthedocs-requirements.txt b/.readthedocs-requirements.txt
index 6238f1981e3c12892e33ed4194ed89aca4e7b82f..1b739cd361e5e263447b5a24a21900d3e45d5d38 100644
--- a/.readthedocs-requirements.txt
+++ b/.readthedocs-requirements.txt
@@ -3,3 +3,4 @@ sphinx>=4.2.0
 #numpy>=1.20.3
 #scipy>=1.7.1
 #matplotlib>=3.4.3
+numpydoc