diff --git a/Oqtane.Client/Installer/Installer.razor b/Oqtane.Client/Installer/Installer.razor
index 18259555..f339367c 100644
--- a/Oqtane.Client/Installer/Installer.razor
+++ b/Oqtane.Client/Installer/Installer.razor
@@ -8,6 +8,7 @@
 @inject IJSRuntime JSRuntime
 @inject IStringLocalizer<Installer> Localizer
 @inject IStringLocalizer<SharedResources> SharedLocalizer
+@inject SiteState SiteState
 
 <div class="container">
     <div class="row">
@@ -137,7 +138,18 @@
 
 	protected override async Task OnInitializedAsync()
 	{
-		_togglePassword = SharedLocalizer["ShowPassword"];
+        // include CSS
+        var content = "<link rel=\"stylesheet\" href=\"https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.3.0/css/bootstrap.min.css\" integrity=\"sha512-t4GWSVZO1eC8BM339Xd7Uphw5s17a86tIZIj8qRxhnKub6WoyhnrxeCIMeAqBPgdZGlCcG2PrZjMc+Wr78+5Xg==\" crossorigin=\"anonymous\" type=\"text/css\"/>";
+        if (string.IsNullOrEmpty(SiteState.Properties.HeadContent))
+        {
+            SiteState.Properties.HeadContent = content;
+        }
+        else if (!SiteState.Properties.HeadContent.Contains(content))
+        {
+            SiteState.Properties.HeadContent += content;
+        }
+        
+        _togglePassword = SharedLocalizer["ShowPassword"];
 		_toggleConfirmPassword = SharedLocalizer["ShowPassword"];
 
 		_databases = await DatabaseService.GetDatabasesAsync();
@@ -185,8 +197,8 @@
 	{
 		if (firstRender)
 		{
+            // include JavaScript
 			var interop = new Interop(JSRuntime);
-            await interop.IncludeLink("", "stylesheet", "https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.3.0/css/bootstrap.min.css", "text/css", "sha512-t4GWSVZO1eC8BM339Xd7Uphw5s17a86tIZIj8qRxhnKub6WoyhnrxeCIMeAqBPgdZGlCcG2PrZjMc+Wr78+5Xg==", "anonymous", "");
             await interop.IncludeScript("", "https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.3.0/js/bootstrap.bundle.min.js", "sha512-VK2zcvntEufaimc+efOYi622VN5ZacdnufnmX7zIhCPmjhKnOi9ZDMtg1/ug5l183f19gG1/cBstPO4D8N/Img==", "anonymous", "", "head");
 		}
 	}