diff --git a/scripts/install b/scripts/install
index e766584..7e489cc 100644
--- a/scripts/install
+++ b/scripts/install
@@ -121,6 +121,7 @@ ynh_install_composer $php_version $final_path
 
 # Prepare Flarum temp directory
 tmp=/tmp/$app
+ynh_secure_remove --file="$tmp"
 mkdir -p $tmp
 chown -R $app:www-data $tmp
 chmod -R 0775 $tmp
diff --git a/scripts/upgrade b/scripts/upgrade
index 74587ba..1c4d34d 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -168,6 +168,7 @@ if [[ $(dpkg --compare-versions $old_project_version lt "0.1.0-beta.8" && echo t
 
 	# Backing up the app directory
 	tmpbak="/tmp/${app}backup"
+	ynh_secure_remove --file="$tmpbak"
 	mkdir -p $tmpbak
 	cp -R $final_path/* $tmpbak