diff --git a/ProtonMail.md b/ProtonMail.md
index b95e1b7..c7632eb 100644
--- a/ProtonMail.md
+++ b/ProtonMail.md
@@ -2,7 +2,7 @@
 
 <img src="https://wekan.github.io/translations/protonmail.png" width="100%" alt="Protonmail with Finnish translation" />
 
-1. Newest Linux Mint/Ubuntu/Debian/WSL:
+1. Newest Linux Mint/Ubuntu/Debian/WSL. Note: You need at least 4 GB RAM free for running Protonmail frontend. If there is not enough RAM, running Protonmail frontend will stop to error.
 
 2. Install Volta node version manager like described at: https://docs.volta.sh/guide/getting-started