diff --git a/src/frontend/content_script/tippy.scss b/src/frontend/content_script/tippy.scss
index f2b2502..5d3c85d 100644
--- a/src/frontend/content_script/tippy.scss
+++ b/src/frontend/content_script/tippy.scss
@@ -4,7 +4,7 @@
 
 .tippy-box[data-theme~="webext"] {
 	background-color: var(--background-color-1);
-	tippy-svg-arrow {
+	.tippy-svg-arrow {
 		fill: var(--background-color-1);
 	}
 	border: 2px solid var(--border-color-1);