diff --git a/framework/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Card/AbpCardTagHelperService.cs b/framework/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Card/AbpCardTagHelperService.cs
index 6169154904..8d41b1e991 100644
--- a/framework/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Card/AbpCardTagHelperService.cs
+++ b/framework/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Card/AbpCardTagHelperService.cs
@@ -8,7 +8,7 @@ public class AbpCardTagHelperService : AbpTagHelperService<AbpCardTagHelper>
     public override void Process(TagHelperContext context, TagHelperOutput output)
     {
         output.TagName = "div";
-        output.Attributes.AddClass("card");
+        output.Attributes.AddClass("card mb-3");
 
         SetBorder(context, output);
     }