diff --git a/scripts/install b/scripts/install
index 8d4db20..7b25211 100755
--- a/scripts/install
+++ b/scripts/install
@@ -22,6 +22,7 @@ ynh_script_progression --message="Setting up source files..." --weight=1
 # Download, check integrity, uncompress and patch the source from app.src
 ynh_setup_source --dest_dir="$install_dir"
 
+chmod -R o-rwx "$install_dir"
 chown -R $app:www-data "$install_dir"
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 87df7f1..87260f9 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -25,6 +25,7 @@ then
 	ynh_setup_source --dest_dir="$install_dir" --keep="config/.env"
 fi
 
+chmod -R o-rwx "$install_dir"
 chown -R $app:www-data "$install_dir"
 
 #=================================================