diff --git a/plusfuture/css/style.css b/plusfuture/css/style.css
index 196c9bd..116f7c6 100644
--- a/plusfuture/css/style.css
+++ b/plusfuture/css/style.css
@@ -1267,7 +1267,7 @@ img.mail-conv-sender-photo {
 	height: 2.35rem;
 	/*カスタマイズ*/
 	border-radius: 50%;
-	filter: drop-shadow(0px 0px 7px rgba(75, 75, 75, 0.678));
+	filter: drop-shadow(2px 2px 3px rgba(75, 75, 75, 0.378));
 }
 
 #nav-app-link {