diff --git a/phpBB/styles/prosilver/theme/colours.css b/phpBB/styles/prosilver/theme/colours.css
index 66a3a112ec..0b23f1e5e9 100644
--- a/phpBB/styles/prosilver/theme/colours.css
+++ b/phpBB/styles/prosilver/theme/colours.css
@@ -1023,6 +1023,8 @@ input.disabled {
 	background-color: #000000;
 }
 
+/* stylelint-disable at-rule-no-vendor-prefix */
+
 @-webkit-keyframes colors {
 	0% {
 		stroke: #4285f4;
@@ -1045,6 +1047,9 @@ input.disabled {
 	}
 }
 
+/* stylelint-enable at-rule-no-vendor-prefix */
+
+
 @keyframes colors {
 	0% {
 		stroke: #4285f4;
diff --git a/phpBB/styles/prosilver/theme/common.css b/phpBB/styles/prosilver/theme/common.css
index 86bf07bfbd..6d9bc4fbc4 100644
--- a/phpBB/styles/prosilver/theme/common.css
+++ b/phpBB/styles/prosilver/theme/common.css
@@ -1061,6 +1061,7 @@ fieldset.fields1 dl.pmlist dd.recipients {
 }
 /* stylelint-enable no-unknown-animations */
 
+/* stylelint-disable at-rule-no-vendor-prefix */
 @-webkit-keyframes rotator {
 	0% {
 		-webkit-transform: rotate(0deg);
@@ -1120,6 +1121,7 @@ fieldset.fields1 dl.pmlist dd.recipients {
 		stroke-dashoffset: 187;
 	}
 }
+/* stylelint-enable at-rule-no-vendor-prefix */
 
 
 /* Miscellaneous styles