diff --git a/src/View/StringTemplate.php b/src/View/StringTemplate.php
index febaedfaed0..6aca4c81990 100644
--- a/src/View/StringTemplate.php
+++ b/src/View/StringTemplate.php
@@ -178,7 +178,7 @@ protected function _compileTemplates(array $templates = [])
                 $this->_compiled[$name] = [null, null];
             }
 
-            preg_match_all('#\{\{(\w+)\}\}#', $template, $matches);
+            preg_match_all('#\{\{([\w\d\._]+)\}\}#', $template, $matches);
             $this->_compiled[$name] = [
                 str_replace($matches[0], '%s', $template),
                 $matches[1]