diff --git a/assets/css/app.css b/assets/css/app.css
index 137387d..142eede 100644
--- a/assets/css/app.css
+++ b/assets/css/app.css
@@ -178,7 +178,7 @@ img {
 }
 
 img.greyscale {
-  filter: grayscale(100) contrast(120%);
+  filter: grayscale(100) brightness(120%);
 }
 
 img.rounded {