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diff --git a/README.md b/README.md
index 1df41ba..6779f92 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,12 @@ developed to aid the creation and manipulation of the data sources.
 
 ## How to use ?
 You can check project via ject command.
+You need to install python-yaml package. If you are using ubuntu, it will be
+
+	> sudo apt install python3-pip
+	> sudo pip3 install --upgrade pip
+	> sudo pip3 install pyyaml
+
 You need to have **.config** file. You can copy sample .config, and edit it
 
 `cp  .config.sample .config`