diff --git a/modules/ext.RevisionSlider.lazy.less b/modules/ext.RevisionSlider.lazy.less
index a77ea8fe..7a8a8b6a 100644
--- a/modules/ext.RevisionSlider.lazy.less
+++ b/modules/ext.RevisionSlider.lazy.less
@@ -77,15 +77,15 @@ https://codepen.io/Volker_E/pen/yqNXMe */
 	}
 }
 
-// Loading spinner animations
+/* Loading spinner animations */
 @-webkit-keyframes bouncedelay {
 	0%,
-	50%, // equals 800ms
+	50%, /* equals 800ms */
 	100% {
 		-webkit-transform: scale( 0.625 );
 	}
 
-	20% { // equals 320ms
+	20% { /* equals 320ms */
 		opacity: 0.87;
 		-webkit-transform: scale( 1 );
 	}
@@ -93,12 +93,12 @@ https://codepen.io/Volker_E/pen/yqNXMe */
 
 @-moz-keyframes bouncedelay {
 	0%,
-	50%, // equals 800ms
+	50%, /* equals 800ms */
 	100% {
 		-moz-transform: scale( 0.625 );
 	}
 
-	20% { // equals 320ms
+	20% { /* equals 320ms */
 		opacity: 0.87;
 		-moz-transform: scale( 1 );
 	}
@@ -106,13 +106,13 @@ https://codepen.io/Volker_E/pen/yqNXMe */
 
 @keyframes bouncedelay {
 	0%,
-	50%, // equals 800ms
+	50%, /* equals 800ms */
 	100% {
 		-ms-transform: scale( 0.625 );
 		transform: scale( 0.625 );
 	}
 
-	20% { // equals 320ms
+	20% { /* equals 320ms */
 		opacity: 0.87;
 		-ms-transform: scale( 1 );
 		transform: scale( 1 );
diff --git a/package.json b/package.json
index cdb2db5e..b080ce4d 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
 		"grunt-eslint": "21.0.0",
 		"grunt-stylelint": "0.10.1",
 		"mwbot": "1.0.10",
-		"stylelint-config-wikimedia": "0.5.0",
+		"stylelint-config-wikimedia": "0.6.0",
 		"wdio-mediawiki": "0.3.0",
 		"wdio-mocha-framework": "0.6.4",
 		"wdio-spec-reporter": "0.1.5",