diff --git a/docs/contributing.rst b/docs/contributing.rst
index a0a80181..60caeecf 100644
--- a/docs/contributing.rst
+++ b/docs/contributing.rst
@@ -77,7 +77,7 @@ After activating the environment install `aiogram` from sources and their depend
 
 .. code-block:: bash
 
-    pip install -e .[dev,test,docs,fast,redis,proxy,i18n]
+    pip install -e ."[dev,test,docs,fast,redis,proxy,i18n]"
 
 It will install :code:`aiogram` in editable mode into your virtual environment and all dependencies.