diff --git a/README.rst b/README.rst
index 2691dfc23d..4db7d17e94 100644
--- a/README.rst
+++ b/README.rst
@@ -272,7 +272,7 @@ to install using pip and a virtualenv::
 
     virtualenv -p python3 env
     source env/bin/activate
-    python -m pip install --no-use-pep517 -e .[all]
+    python -m pip install --no-use-pep517 -e ".[all]"
 
 This will run a process of downloading and installing all the needed
 dependencies into a virtual env.
diff --git a/changelog.d/6855.misc b/changelog.d/6855.misc
new file mode 100644
index 0000000000..904361ddfb
--- /dev/null
+++ b/changelog.d/6855.misc
@@ -0,0 +1 @@
+Update pip install directiosn in readme to avoid error when using zsh.