diff --git a/_ajax/update_presence.php b/_ajax/update_presence.php
old mode 100755
new mode 100644
diff --git a/common.php b/common.php
old mode 100755
new mode 100644
diff --git a/event_handler.php b/event_handler.php
old mode 100755
new mode 100644
diff --git a/index.php b/index.php
old mode 100755
new mode 100644