diff --git a/src/popup/scss/popup.scss b/src/popup/scss/popup.scss
index 9ed9c279e86..d5f2bc30706 100644
--- a/src/popup/scss/popup.scss
+++ b/src/popup/scss/popup.scss
@@ -1,5 +1,5 @@
 @import "../../../jslib/angular/src/scss/webfonts.css";
-$dark-icon-themes: 'theme_dark', 'theme_solarizedDark', 'theme_nord';
+$dark-icon-themes: "theme_dark", "theme_solarizedDark", "theme_nord";
 @import "../../../jslib/angular/src/scss/icons.scss";
 
 @import "variables.scss";