diff --git a/scripts/install b/scripts/install
index 4ca4d41..391c534 100755
--- a/scripts/install
+++ b/scripts/install
@@ -18,7 +18,7 @@ ynh_script_progression --message="Setting up source files..." --weight=1
 ynh_setup_source --dest_dir="$install_dir"
 
 # Set permissions to app files
-chmod u+x "$install_dir/grammalecte-server.py"
+chmod +x "$install_dir/grammalecte-server.py"
 chown -R "$app:www-data" "$install_dir"
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 258bae3..8a28ccb 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -18,7 +18,8 @@ ynh_script_progression --message="Stopping a systemd service..." --weight=1
 
 ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app/$app.log"
 
-chmod u+x "$install_dir/grammalecte-server.py"
+# Set permissions to app files
+chmod +x "$install_dir/grammalecte-server.py"
 chown -R "$app:www-data" "$install_dir"
 
 #=================================================