diff --git a/Linux-DEB-and-RPM-support.md b/Linux-DEB-and-RPM-support.md
index e84f2d1..de2e076 100644
--- a/Linux-DEB-and-RPM-support.md
+++ b/Linux-DEB-and-RPM-support.md
@@ -21,7 +21,8 @@ The purpose of this page is to show the last version of BOINC available for ever
 ### Installation:
 1. `sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 40254C9B29853EA6`
 2. `sudo apt-add-repository deb https://boinc.berkeley.edu/dl/linux/[stable][alpha][nightly]/[Codename] [Codename] main`
-3. `sudo apt install boinc-client boinc-manager`
+3. `sudo apt update`
+4. `sudo apt install boinc-client boinc-manager`
 
 # RPM-based OSs