diff --git a/README.rst b/README.rst
index b20d0d9..24613e3 100644
--- a/README.rst
+++ b/README.rst
@@ -24,6 +24,11 @@ You can install following command.
 
   $ make install
 
+Note
+~~~~
+
+If you using venv or virtualenv, you may deactivate venv/virtualenv first.
+doq will create own venv.
 
 This can be automated with vim-plug. Activated venv needs to be deactivated before running `PlugInstall` or `PlugUpdate`. 
 
diff --git a/doc/pydocstring.txt b/doc/pydocstring.txt
index 2ca84a5..70b007c 100644
--- a/doc/pydocstring.txt
+++ b/doc/pydocstring.txt
@@ -50,6 +50,9 @@ If you want install `doq` manually, you can install from `PyPi`.
 <
 Than set installed `doq` path to |g:pydocstring_doq_path|.
 
+If you using venv or virtualenv, you may deactivate venv/virtualenv first.
+doq will create own venv.
+
 ==============================================================================
 TUTORIAL					*pydocstring-vim-tutorial*