diff --git a/docs/readme b/docs/readme
index 88b976c8..03187eb1 100644
--- a/docs/readme
+++ b/docs/readme
@@ -1,5 +1,6 @@
 To build the documentation, please set up Python 3.8 and:
     pip install -r ../requirements.txt
+    pip install -r ../requirements_nn.txt
     pip install -r requirements.txt
     git submodule init
     git submodule update