diff --git a/src/public/stylesheets/style.css b/src/public/stylesheets/style.css
index 93c531346..ebf1cd02b 100644
--- a/src/public/stylesheets/style.css
+++ b/src/public/stylesheets/style.css
@@ -640,6 +640,7 @@ a.external:not(.no-arrow):after, a[href^="http://"]:not(.no-arrow):after, a[href
     color: var(--main-text-color) !important;
     z-index: 9999999999 !important;
     pointer-events: all;
+    flex-basis: 0; /* otherwise toast is always at least 350px tall (happens since 4.5.1, perhaps a bug) */
 }
 
 .toast-header {