diff --git a/update.sh b/update.sh
index 0f93dbd1..fc4410c3 100755
--- a/update.sh
+++ b/update.sh
@@ -208,9 +208,8 @@ docker-compose pull --parallel
 cp -n data/assets/ssl-example/*.pem data/assets/ssl/
 
 echo -e "Fixing project name... "
-sed -i 's/COMPOSEPROJECT_NAME/COMPOSE_PROJECT_NAME/g' mailcow.conf
-sed -i '/COMPOSE_PROJECT_NAME=.*/{s/-//}' mailcow.conf
-sed -i '/COMPOSE_PROJECT_NAME=.*/{s/_//}' mailcow.conf
+sed -ie 's#COMPOSEPROJECT_NAME#COMPOSE_PROJECT_NAME#g' mailcow.conf
+sed -i '/COMPOSE_PROJECT_NAME=/s/-//g' mailcow.conf
 
 echo -e "\e[32mStarting mailcow...\e[0m"
 sleep 2