diff --git a/ts/deck-options/FsrsOptions.svelte b/ts/deck-options/FsrsOptions.svelte
index afb955c4b..bccf8a87c 100644
--- a/ts/deck-options/FsrsOptions.svelte
+++ b/ts/deck-options/FsrsOptions.svelte
@@ -72,7 +72,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     function getRetentionWarningClass(retention: number): string {
         if (retention < 0.7 || retention > 0.97) {
             return "alert-danger";
-        } else if (retention < 0.85 || retention > 0.95) {
+        } else if (retention < 0.8 || retention > 0.95) {
             return "alert-warning";
         } else {
             return "alert-info";