diff --git a/README.md b/README.md
index 1287c2487b4d9174138d1de27a18ecfad7d85fc6..4b4e25e37eb0ee12bb8b3fe532f30b015f644181 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,7 @@ export CI_WRAPPER_HOME=${HOME}/.ci-wrappers
 ### Setup docker
 
   - if you have an http proxy :
+    - YOU PASSWORD CAN'T CONTAINS CARACTERS FORBIDDEN IN URL
     - sets the needed variables `HTTP_PROXY`, `HTTPS_PROXY` and `NO_PROXY`
     - and adds the variables `VAGRANT_HTTP_PROXY`, `VAGRANT_HTTPS_PROXY` and `VAGRANT_NO_PROXY`
     - install the vagrant plugin for proxies : <br/>