diff --git a/assets/css/admin.scss b/assets/css/admin.scss
index 668eeef..40bfaf3 100644
--- a/assets/css/admin.scss
+++ b/assets/css/admin.scss
@@ -511,6 +511,8 @@ form {
 
 .modal-dialog-large {
     max-width: 80%;
+    margin-left: auto;
+    margin-right: auto;
 }
 
 .output {