diff --git a/docs/installation.rst b/docs/installation.rst
index 9eb5c931..60443798 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -47,7 +47,7 @@ Paste each command at a Terminal prompt and run using `pip <https://pip.pypa.io>
 .. code-block:: bash
 
     pip install --upgrade pip setuptools scons
-    pip install -U platformio
+    pip install platformio
 
 If your computer does not recognize ``pip`` command, try to install it first
 using `these instructions <https://pip.pypa.io/en/latest/installing.html>`_.