diff --git a/README.md b/README.md
index b523140..87dba7d 100644
--- a/README.md
+++ b/README.md
@@ -46,8 +46,8 @@ sudo apt-get install python3-dev python3-pip libpq5
 cd /usr/local/src/
 sudo git clone https://github.com/MISP/misp-modules.git
 cd misp-modules
-sudo pip3 install --upgrade -r REQUIREMENTS
-sudo pip3 install --upgrade .
+sudo pip3 install -I -r REQUIREMENTS
+sudo pip3 install -I .
 sudo vi /etc/rc.local, add this line: `sudo -u www-data misp-modules -s &`
 ~~~~