diff --git a/phpBB/styles/prosilver/theme/stylesheet.css b/phpBB/styles/prosilver/theme/stylesheet.css
index c402d563c6..7c134b17a4 100644
--- a/phpBB/styles/prosilver/theme/stylesheet.css
+++ b/phpBB/styles/prosilver/theme/stylesheet.css
@@ -7,15 +7,15 @@
     --------------------------------------------------------------
 */
 
-@import url("normalize.css?v=3.3");
-@import url("base.css?v=3.3");
-@import url("utilities.css?v=3.3");
-@import url("common.css?v=3.3");
-@import url("links.css?v=3.3");
-@import url("content.css?v=3.3");
-@import url("buttons.css?v=3.3");
-@import url("cp.css?v=3.3");
-@import url("forms.css?v=3.3");
-@import url("icons.css?v=3.3");
-@import url("colours.css?v=3.3");
-@import url("responsive.css?v=3.3");
+@import url("normalize.css?v=3.3.1");
+@import url("base.css?v=3.3.1");
+@import url("utilities.css?v=3.3.1");
+@import url("common.css?v=3.3.1");
+@import url("links.css?v=3.3.1");
+@import url("content.css?v=3.3.1");
+@import url("buttons.css?v=3.3.1");
+@import url("cp.css?v=3.3.1");
+@import url("forms.css?v=3.3.1");
+@import url("icons.css?v=3.3.1");
+@import url("colours.css?v=3.3.1");
+@import url("responsive.css?v=3.3.1");