diff --git a/readme.md b/readme.md
index 75591aafc..47a8f2ccd 100644
--- a/readme.md
+++ b/readme.md
@@ -63,7 +63,7 @@ flatpak install com.usebruno.Bruno
 sudo mkdir -p /etc/apt/keyrings
 sudo gpg --no-default-keyring --keyring /etc/apt/keyrings/bruno.gpg --keyserver keyserver.ubuntu.com --recv-keys 9FA6017ECABE0266
 
-echo "deb [signed-by=/etc/apt/keyrings/bruno.gpg] http://debian.usebruno.com/ bruno stable" | sudo tee /etc/apt/sources.list.d/bruno.list
+echo "deb [arch=amd64 signed-by=/etc/apt/keyrings/bruno.gpg] http://debian.usebruno.com/ bruno stable" | sudo tee /etc/apt/sources.list.d/bruno.list
 
 sudo apt update
 sudo apt install bruno