diff --git a/readme.md b/readme.md
index 0d042c1..a61638c 100644
--- a/readme.md
+++ b/readme.md
@@ -6,6 +6,9 @@
 
 virtualenv -p python3 virtualenv.sikweb
 
+### Install py3 dev
+`sudo apt-get install python3-dev`
+
 ### clone This repo and enter it
 
 git clone url_to_repo
@@ -55,4 +58,4 @@ assuming we are on root of this repo and virtualenv is one step above:
 ### use runserver command
 `./manage.py runserver`
 
-`or./manage.py runserver 0.0.0.0:8000` if you need to connect from anywhere else than localhost
\ No newline at end of file
+`or./manage.py runserver 0.0.0.0:8000` if you need to connect from anywhere else than localhost