diff --git a/.stylelintrc.json b/.stylelintrc.json
index 48b70a82..2c907302 100644
--- a/.stylelintrc.json
+++ b/.stylelintrc.json
@@ -1,6 +1,3 @@
 {
-	"extends": "stylelint-config-wikimedia",
-	"rules": {
-		"selector-pseudo-element-colon-notation": null
-	}
+	"extends": "stylelint-config-wikimedia"
 }
diff --git a/modules/pygments.wrapper.less b/modules/pygments.wrapper.less
index ee0e29d5..b59fcd13 100644
--- a/modules/pygments.wrapper.less
+++ b/modules/pygments.wrapper.less
@@ -102,7 +102,7 @@
 			margin-left: 4px;
 		}
 
-		&:before {
+		&::before {
 			content: attr( data-line );
 		}
 	}