diff --git a/assets/sass/layout.scss b/assets/sass/layout.scss
index e91200e..a818460 100644
--- a/assets/sass/layout.scss
+++ b/assets/sass/layout.scss
@@ -652,6 +652,7 @@ button, .button {
 		top: 0;
 		width: var(--progress);
 		height: 100%;
+		transition: width ease-out 150ms;
 
 		background: $secondary;
 	}