diff --git a/Quickstart.md b/Quickstart.md
index f281657..ca4e3b3 100644
--- a/Quickstart.md
+++ b/Quickstart.md
@@ -6,7 +6,7 @@ It works the same way on Linux, macOS, Windows. Only the installation will be di
 
 ## Prerequisites
 
-* Java Runtime Environment (**signal-cli requires at least JRE 17**)
+* Java Runtime Environment (**signal-cli requires at least JRE 21**)
   - Debian 11: `sudo apt-get install openjdk-17-jre`
   - Ubuntu 22.04: `sudo apt install openjdk-18-jre`
   - Arch Linux: `pacman -S jre-openjdk`