diff --git a/modules/basic-theme/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Basic/Bundling/BasicThemeGlobalStyleContributor.cs b/modules/basic-theme/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Basic/Bundling/BasicThemeGlobalStyleContributor.cs
index e5254366d4..bf60b4ccd0 100644
--- a/modules/basic-theme/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Basic/Bundling/BasicThemeGlobalStyleContributor.cs
+++ b/modules/basic-theme/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Basic/Bundling/BasicThemeGlobalStyleContributor.cs
@@ -7,7 +7,6 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Theme.Basic.Bundling
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
             context.Files.Add("/themes/basic/layout.css");
-            context.Files.Add("/themes/basic/custom/select2-bs5-fix.css");
         }
     }
 }
diff --git a/modules/basic-theme/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Basic/wwwroot/themes/basic/custom/select2-bs5-fix.css b/modules/basic-theme/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Basic/wwwroot/themes/basic/custom/select2-bs5-fix.css
deleted file mode 100644
index beb981c139..0000000000
--- a/modules/basic-theme/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Basic/wwwroot/themes/basic/custom/select2-bs5-fix.css
+++ /dev/null
@@ -1,4 +0,0 @@
-/*TODO: Remove after BS5 Modal support of select2 */
-span.select2-container.select2-container--default.select2-container--open {
-    z-index: 1056; /*Just for BS5 Modals*/
-}