diff --git a/phpBB/styles/prosilver/theme/stylesheet.css b/phpBB/styles/prosilver/theme/stylesheet.css
index 1faab8bbd2..45eb5b6fc9 100644
--- a/phpBB/styles/prosilver/theme/stylesheet.css
+++ b/phpBB/styles/prosilver/theme/stylesheet.css
@@ -7,15 +7,15 @@
     --------------------------------------------------------------
 */
 
-@import url("normalize.css");
-@import url("base.css");
-@import url("utilities.css");
-@import url("common.css");
-@import url("links.css");
-@import url("content.css");
-@import url("buttons.css");
-@import url("cp.css");
-@import url("forms.css");
-@import url("icons.css");
-@import url("colours.css");
-@import url("responsive.css");
+@import url("normalize.css?v=3.2");
+@import url("base.css?v=3.2");
+@import url("utilities.css?v=3.2");
+@import url("common.css?v=3.2");
+@import url("links.css?v=3.2");
+@import url("content.css?v=3.2");
+@import url("buttons.css?v=3.2");
+@import url("cp.css?v=3.2");
+@import url("forms.css?v=3.2");
+@import url("icons.css?v=3.2");
+@import url("colours.css?v=3.2");
+@import url("responsive.css?v=3.2");