diff --git a/phpBB/styles/prosilver/theme/stylesheet.css b/phpBB/styles/prosilver/theme/stylesheet.css
index 7c134b17a4..dd30ee42da 100644
--- a/phpBB/styles/prosilver/theme/stylesheet.css
+++ b/phpBB/styles/prosilver/theme/stylesheet.css
@@ -7,15 +7,15 @@
     --------------------------------------------------------------
 */
 
-@import url("normalize.css?v=3.3.1");
-@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");
+@import url("normalize.css?hash=48eb3f89");
+@import url("base.css?hash=3a7fafb1");
+@import url("utilities.css?hash=1034bac8");
+@import url("common.css?hash=009a715d");
+@import url("links.css?hash=da040ebb");
+@import url("content.css?hash=d7d65e66");
+@import url("buttons.css?hash=15c14833");
+@import url("cp.css?hash=5cc9ac0c");
+@import url("forms.css?hash=18ee8211");
+@import url("icons.css?hash=ed93c566");
+@import url("colours.css?hash=3b03ccfa");
+@import url("responsive.css?hash=438ff202");