diff --git a/cms/static/sass/elements/_modal-window.scss b/cms/static/sass/elements/_modal-window.scss
index b6508ef49a01..f195c33ada39 100644
--- a/cms/static/sass/elements/_modal-window.scss
+++ b/cms/static/sass/elements/_modal-window.scss
@@ -300,7 +300,7 @@
       }
 
       .modal-content {
-        height: 435px;
+        height: calc(100vh - 100px);
         overflow-y: auto;
         overflow-x: hidden;
         padding: 0;