diff --git a/public/install/index.php b/public/install/index.php
index e66f3f08..d2e4e37e 100644
--- a/public/install/index.php
+++ b/public/install/index.php
@@ -22,6 +22,7 @@ if (file_exists("../../install.lock")) {
             left: 50%;
             margin-right: -50%;
             transform: translate(-50%, -50%);
+            width: 30%;
         }
 
         .ok {