diff --git a/README.md b/README.md
index 050ceb1ccd848ac47f42e1ace2df6a8f653801f2..289b4ec3ffc181797e5da88858c0461ee3b48530 100644
--- a/README.md
+++ b/README.md
@@ -95,7 +95,7 @@ The tool uses following status for IdPs:
 # Requirements Software
 
 * Apache Server + WSGI
-* Python 3 (tested with v3.9.1, v3.9.7)
+* Python 3 (tested with v3.9.1)
 * Selenim + Google Chrome Web Brower (tested with v91.0.4472.164)
 * Chromedriver (tested with v91.0.4472.101)
 * Git
@@ -136,14 +136,14 @@ The tool uses following status for IdPs:
 ### Install
 
 1. Download the last version of Python 3 from https://www.python.org/downloads/source/ into your home:
-   * `wget https://www.python.org/ftp/python/3.9.7/Python-3.9.7.tgz -O $HOME/eccs/Python-3.9.7.tgz`
+   * `wget https://www.python.org/ftp/python/3.9.1/Python-3.9.1.tgz -O $HOME/eccs/Python-3.9.1.tgz`
 
 2. Extract Python source package:
    * `cd $HOME/eccs/`
-   * `tar xzf Python-3.9.7.tgz`
+   * `tar xzf Python-3.9.1.tgz`
 
 3. Build Python from the source package:
-   * `cd $HOME/eccs/Python-3.9.7`
+   * `cd $HOME/eccs/Python-3.9.1`
    * `./configure --prefix=$HOME/eccs/python`
    * `make`
 
@@ -154,7 +154,7 @@ The tool uses following status for IdPs:
    This will install python3 under your $HOME/eccs directory.
    
 5. Remove useless things:
-   * `rm -Rf $HOME/eccs/Python-3.9.7 $HOME/eccs/Python-3.9.7.tgz`
+   * `rm -Rf $HOME/eccs/Python-3.9.1 $HOME/eccs/Python-3.9.1.tgz`
 
 ## Install Google Chrome needed by Selenium