diff --git a/Classes/Service/SiteDeterminationService.php b/Classes/Service/SiteDeterminationService.php
index 050833b..551201c 100644
--- a/Classes/Service/SiteDeterminationService.php
+++ b/Classes/Service/SiteDeterminationService.php
@@ -34,7 +34,7 @@ public function getCurrentSiteName(): ?string
          * Site as uri path segment
          * Used to get dimension constraints in the backend
          */
-        preg_match('/content-dimensions\/(\S+)\/country\.json/', $httpRequest->getUri()->getPath(), $matches, PREG_OFFSET_CAPTURE);
+        preg_match('/content-dimensions\/([a-zA-Z\-\_\.]+)\/[a-zA-Z\-\_]+\.json/', $httpRequest->getUri()->getPath(), $matches, PREG_OFFSET_CAPTURE);
         if (($matches[1] ?? null) !== null) {
             self::$siteName = $matches[1][0];
             return self::$siteName;