diff --git a/install.sh b/install.sh
index 3a01b17..70076fb 100644
--- a/install.sh
+++ b/install.sh
@@ -92,7 +92,9 @@ sed -i "s/^CRYPTPASSWORD .*/CRYPTPASSWORD $LUKS_PASS/" install.conf
 
 # Update post-install.sh
 sed -i "s/^ALMA_USER=.*/ALMA_USER=\"$USERNAME\"/" post-install.sh
-sed -i "s|^SSH_KEY=.*|SSH_KEY=\"$SSH_KEY\"|" post-install.sh
+# Use a different approach for SSH_KEY to handle special characters
+escaped_key=$(printf '%s\n' "$SSH_KEY" | sed 's/[[\.*^$()+?{|]/\\&/g')
+sed -i "s|^SSH_KEY=.*|SSH_KEY=\"$escaped_key\"|" post-install.sh
 
 # Copy to root directory where installimage expects them
 cp install.conf /root/