diff --git a/src/Senparc.Log/Senparc.Log.csproj b/src/Senparc.Log/Senparc.Log.csproj
index e221f720..bf9048df 100644
--- a/src/Senparc.Log/Senparc.Log.csproj
+++ b/src/Senparc.Log/Senparc.Log.csproj
@@ -9,7 +9,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="log4net" Version="2.0.8" />
+    <PackageReference Include="log4net" Version="2.0.10" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/Senparc.Web/Senparc.Web.csproj b/src/Senparc.Web/Senparc.Web.csproj
index 58cdbb4d..374f66d2 100644
--- a/src/Senparc.Web/Senparc.Web.csproj
+++ b/src/Senparc.Web/Senparc.Web.csproj
@@ -12,7 +12,7 @@
     <!--https://docs.microsoft.com/en-us/aspnet/core/mvc/views/view-compilation?view=aspnetcore-3.1-->
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation" Version="3.1.2" />
 
-    <PackageReference Include="log4net" Version="2.0.8" />
+    <PackageReference Include="log4net" Version="2.0.10" />
     <PackageReference Include="Microsoft.DotNet.Watcher.Tools" Version="2.0.2" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.1.2" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer.Design" Version="2.0.0-preview1-final" />