diff --git a/DOCUMENTATION.md b/DOCUMENTATION.md
index 74ea3cb0dd..da5b31c3ed 100644
--- a/DOCUMENTATION.md
+++ b/DOCUMENTATION.md
@@ -7,6 +7,7 @@
   pip install sphinxcontrib-spelling==4.3.0
   pip install sphinxcontrib.serializinghtml==1.1.5
   pip install sphinxcontrib.htmlhelp==1.0.3
+  pip install sphinxcontrib-devhelp==1.0.3
   pip install sphinx==2.4.5
   ```