diff --git a/TaxBaik.Web/Components/Admin/Pages/Blog/BlogCreate.razor b/TaxBaik.Web/Components/Admin/Pages/Blog/BlogCreate.razor
index fabf2fb..5999b08 100644
--- a/TaxBaik.Web/Components/Admin/Pages/Blog/BlogCreate.razor
+++ b/TaxBaik.Web/Components/Admin/Pages/Blog/BlogCreate.razor
@@ -24,11 +24,11 @@
         <MudTextField @bind-Value="model.Title" Label="제목"
             Variant="Variant.Outlined" Class="mb-4" Required="true" />
 
-        <MudSelect @bind-Value="model.CategoryId" Label="카테고리"
+        <MudSelect T="int?" @bind-Value="model.CategoryId" Label="카테고리"
             Variant="Variant.Outlined" Class="mb-4">
             @foreach (var category in categories)
             {
-                <MudSelectItem Value="@category.Id">@category.Name</MudSelectItem>
+                <MudSelectItem T="int?" Value="@((int?)category.Id)">@category.Name</MudSelectItem>
             }
         </MudSelect>
 
diff --git a/TaxBaik.Web/Components/Admin/Pages/Blog/BlogEdit.razor b/TaxBaik.Web/Components/Admin/Pages/Blog/BlogEdit.razor
index 9b7bdd5..de0d296 100644
--- a/TaxBaik.Web/Components/Admin/Pages/Blog/BlogEdit.razor
+++ b/TaxBaik.Web/Components/Admin/Pages/Blog/BlogEdit.razor
@@ -35,11 +35,11 @@ else
             <MudTextField @bind-Value="model.Title" Label="제목"
                 Variant="Variant.Outlined" Class="mb-4" Required="true" />
 
-            <MudSelect @bind-Value="model.CategoryId" Label="카테고리"
+            <MudSelect T="int?" @bind-Value="model.CategoryId" Label="카테고리"
                 Variant="Variant.Outlined" Class="mb-4">
                 @foreach (var category in categories)
                 {
-                    <MudSelectItem Value="@category.Id">@category.Name</MudSelectItem>
+                    <MudSelectItem T="int?" Value="@((int?)category.Id)">@category.Name</MudSelectItem>
                 }
             </MudSelect>