diff --git a/src/Service/DefaultBlockInstaller.php b/src/Service/DefaultBlockInstaller.php
index b1f1069..46a1d8b 100644
--- a/src/Service/DefaultBlockInstaller.php
+++ b/src/Service/DefaultBlockInstaller.php
@@ -60,7 +60,7 @@ protected function blockDefinitions(string $module): array {
    */
   protected function targetThemes(): array {
 
-    $themes = ['localgov_base', 'localgov_scarfolk'];
+    $themes = ['localgov_base', 'localgov_scarfolk', 'localgov_microsites_base'];
 
     $activeTheme = $this->getActiveThemeName();
     if ($activeTheme && !in_array($activeTheme, $themes, TRUE)) {