diff --git a/CONTRIBUTORS.rst b/CONTRIBUTORS.rst
index 7b48787fa3..b3807a5ed4 100644
--- a/CONTRIBUTORS.rst
+++ b/CONTRIBUTORS.rst
@@ -221,6 +221,7 @@ Contributors
 * Tom Hendrikx
 * Ralph Jacobs
 * Wietze Helmantel
+* Patrick Gerken
 
 Translators
 ===========
diff --git a/docs/contributing/developing.rst b/docs/contributing/developing.rst
index a45e8f2777..2554cf7866 100644
--- a/docs/contributing/developing.rst
+++ b/docs/contributing/developing.rst
@@ -31,7 +31,7 @@ With your preferred virtualenv activated, install the Wagtail package in develop
 
 .. code-block:: console
 
-    $ pip install -e .[testing,docs] -U
+    $ pip install -e '.[testing,docs]' -U
 
 Install Node through nvm (optional):