diff --git a/README.md b/README.md
index ac13763..509633c 100644
--- a/README.md
+++ b/README.md
@@ -93,6 +93,7 @@ Install the Stable Baselines3 package:
 ```
 pip install stable-baselines3[extra]
 ```
+**Note:** Some shells such as Zsh require quotation marks around brackets, i.e. `pip install 'stable-baselines3[extra]'` ([More Info](https://stackoverflow.com/a/30539963)).
 
 This includes an optional dependencies like Tensorboard, OpenCV or `atari-py` to train on atari games. If you do not need those, you can use:
 ```
diff --git a/docs/guide/install.rst b/docs/guide/install.rst
index 9632777..926836e 100644
--- a/docs/guide/install.rst
+++ b/docs/guide/install.rst
@@ -29,6 +29,10 @@ To install Stable Baselines3 with pip, execute:
 
     pip install stable-baselines3[extra]
 
+.. note::
+        Some shells such as Zsh require quotation marks around brackets, i.e. ``pip install 'stable-baselines3[extra]'`` `More information <https://stackoverflow.com/a/30539963>`_. 
+
+
 This includes an optional dependencies like Tensorboard, OpenCV or ``atari-py`` to train on atari games. If you do not need those, you can use:
 
 .. code-block:: bash
diff --git a/docs/misc/changelog.rst b/docs/misc/changelog.rst
index 99effa6..6560975 100644
--- a/docs/misc/changelog.rst
+++ b/docs/misc/changelog.rst
@@ -31,6 +31,7 @@ Documentation:
 - Added link to SuperSuit in projects (@justinkterry)
 - Fixed DQN example (thanks @ltbd78)
 - Clarify channel-first/channel-last recommendation
+- Clarify pip installation in Zsh (@tom-doerr)
 
 
 Release 1.0 (2021-03-15)
@@ -640,4 +641,4 @@ And all the contributors:
 @tirafesi @blurLake @koulakis @joeljosephjin @shwang @rk37 @andyshih12 @RaphaelWag @xicocaio
 @diditforlulz273 @liorcohen5 @ManifoldFR @mloo3 @SwamyDev @wmmc88 @megan-klaiber @thisray
 @tfederico @hn2 @LucasAlegre @AptX395 @zampanteymedio @decodyng @ardabbour @lorenz-h @mschweizer @lorepieri8
-@ShangqunYu @PierreExeter @JacopoPan @ltbd78
+@ShangqunYu @PierreExeter @JacopoPan @ltbd78 @tom-doerr