diff --git a/OpenAuth.Repository/Domain/Module.cs b/OpenAuth.Repository/Domain/Module.cs
index a5332b03..2ab0b9b3 100644
--- a/OpenAuth.Repository/Domain/Module.cs
+++ b/OpenAuth.Repository/Domain/Module.cs
@@ -94,7 +94,7 @@ namespace OpenAuth.Repository.Domain
         /// 前端界面是否缓存
         /// </summary>
         /// [Description("前端界面是否缓存")]
-        public bool? KeepAlive { get; set; }
+        public bool KeepAlive { get; set; }
 
     }
 }
\ No newline at end of file
diff --git a/OpenAuth.Repository/OpenAuthDBContext.cs b/OpenAuth.Repository/OpenAuthDBContext.cs
index bbe57044..d73864dd 100644
--- a/OpenAuth.Repository/OpenAuthDBContext.cs
+++ b/OpenAuth.Repository/OpenAuthDBContext.cs
@@ -95,6 +95,14 @@ namespace OpenAuth.Repository
                         {
                             property.SetValueConverter(boolToSmallIntConverter);
                         }
+
+                        //解决PostgreSQL时间戳问题
+                        if (Database.ProviderName == "Npgsql.EntityFrameworkCore.PostgreSQL" &&
+                            property.ClrType == typeof(DateTime))
+                        {
+                            property.SetValueConverter(new ValueConverter<DateTime, DateTime>(
+                                v => v.ToUniversalTime(), v => DateTime.SpecifyKind(v, DateTimeKind.Utc)));
+                        }
                     }
                 }
             }