diff --git a/Signum.Engine.Extensions/Signum.Engine.Extensions.csproj b/Signum.Engine.Extensions/Signum.Engine.Extensions.csproj
index 2ca4f7fa2f..c55c1403bd 100644
--- a/Signum.Engine.Extensions/Signum.Engine.Extensions.csproj
+++ b/Signum.Engine.Extensions/Signum.Engine.Extensions.csproj
@@ -26,7 +26,7 @@
 		<PackageReference Include="Microsoft.AspNetCore.Html.Abstractions" Version="2.2.0" />
 		<PackageReference Include="Microsoft.AspNetCore.StaticFiles" Version="2.2.0" />
 		<PackageReference Include="Microsoft.AspNetCore.WebUtilities" Version="2.2.0" />
-		<PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.11.0" />
+		<PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.0.1" />
 		<PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
 		<PackageReference Include="System.DirectoryServices" Version="6.0.0" />
 		<PackageReference Include="System.DirectoryServices.AccountManagement" Version="6.0.0" />
diff --git a/Signum.Engine/Connection/FieldReader.cs b/Signum.Engine/Connection/FieldReader.cs
index c387d03454..fa7dd3ebd9 100644
--- a/Signum.Engine/Connection/FieldReader.cs
+++ b/Signum.Engine/Connection/FieldReader.cs
@@ -16,7 +16,7 @@ public class FieldReader
     private const TypeCode tcGuid = (TypeCode)20;
     private const TypeCode tcTimeSpan = (TypeCode)21;
     private const TypeCode tcDateTimeOffset = (TypeCode)22;
-    private const TypeCode tcNpgsqlDate = (TypeCode)24;
+    private const TypeCode tcDateOnly = (TypeCode)24;
 
     public int? LastOrdinal;
     public string? LastMethodName;
@@ -36,8 +36,8 @@ TypeCode GetTypeCode(int ordinal)
             if (type == typeof(DateTimeOffset))
                 tc = tcDateTimeOffset;
 
-            if (type == typeof(NpgsqlTypes.NpgsqlDate))
-                tc = tcNpgsqlDate;
+            if (type == typeof(DateOnly))
+                tc = tcDateOnly;
         }
         return tc;
     }
@@ -391,8 +391,8 @@ public DateOnly GetDateOnly(int ordinal)
         var dt = typeCodes[ordinal] switch
         {
             TypeCode.DateTime => reader.GetDateTime(ordinal).ToDateOnly(),
-            FieldReader.tcNpgsqlDate => ((DateTime)((NpgsqlDataReader)reader).GetDate(ordinal)).ToDateOnly(),
-            _ => ReflectionTools.ChangeType<DateTime>(reader.GetValue(ordinal)).ToDateOnly(),
+            tcDateOnly => reader.GetFieldValue<DateOnly>(ordinal),
+            _ => reader.GetFieldValue<DateOnly>(ordinal),
         };
         return dt;
     }
diff --git a/Signum.Engine/Connection/PostgreSqlConnector.cs b/Signum.Engine/Connection/PostgreSqlConnector.cs
index 33b35807e6..3e2f6b4f76 100644
--- a/Signum.Engine/Connection/PostgreSqlConnector.cs
+++ b/Signum.Engine/Connection/PostgreSqlConnector.cs
@@ -506,8 +506,6 @@ public override DbParameter CreateParameter(string parameterName, AbstractDbType
         {
             if (value is DateTime dt)
                 AssertDateTime(dt);
-            else if (value is DateOnly d)
-                value = new NpgsqlDate(d.ToDateTimeAutoUTC());
         }
 
         var result = new Npgsql.NpgsqlParameter(parameterName, value ?? DBNull.Value)
diff --git a/Signum.Engine/Signum.Engine.csproj b/Signum.Engine/Signum.Engine.csproj
index abfebe59e8..20fbb6942b 100644
--- a/Signum.Engine/Signum.Engine.csproj
+++ b/Signum.Engine/Signum.Engine.csproj
@@ -16,7 +16,7 @@
 
 	<ItemGroup>
 		<PackageReference Include="Microsoft.Data.SqlClient" Version="3.0.1" />
-		<PackageReference Include="Npgsql" Version="5.0.10" />
+		<PackageReference Include="Npgsql" Version="6.0.0" />
 		<PackageReference Include="Signum.Analyzer" Version="3.2.0" />
 		<PackageReference Include="Signum.MSBuildTask" Version="5.0.0" />
 	</ItemGroup>
diff --git a/Signum.Entities.Extensions/Signum.Entities.Extensions.csproj b/Signum.Entities.Extensions/Signum.Entities.Extensions.csproj
index e7f35f23c3..f4b56931ae 100644
--- a/Signum.Entities.Extensions/Signum.Entities.Extensions.csproj
+++ b/Signum.Entities.Extensions/Signum.Entities.Extensions.csproj
@@ -14,7 +14,7 @@
 		<PackageReference Include="Signum.Analyzer" Version="3.2.0" />
     <PackageReference Include="Signum.MSBuildTask" Version="5.0.0" />
 		<PackageReference Include="DocumentFormat.OpenXml" Version="2.14.0" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.11.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.0.1" />
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
     <PackageReference Include="System.Runtime.Loader" Version="4.3.0" />
 		<PackageReference Include="Unofficial.Microsoft.SqlServer.Types" Version="2.0.1" />
diff --git a/Signum.Entities/Signum.Entities.csproj b/Signum.Entities/Signum.Entities.csproj
index b5464d81c1..24cb552c7b 100644
--- a/Signum.Entities/Signum.Entities.csproj
+++ b/Signum.Entities/Signum.Entities.csproj
@@ -7,7 +7,7 @@
 	</PropertyGroup>
 
 	<ItemGroup>
-		<PackageReference Include="Npgsql" Version="5.0.10" />
+		<PackageReference Include="Npgsql" Version="6.0.0" />
 		<PackageReference Include="Signum.Analyzer" Version="3.2.0" />
 		<PackageReference Include="Signum.MSBuildTask" Version="5.0.0" />
 	</ItemGroup>
diff --git a/Signum.Entities/TimeZoneManager.cs b/Signum.Entities/TimeZoneManager.cs
index 07b653a0e3..1b27c6465f 100644
--- a/Signum.Entities/TimeZoneManager.cs
+++ b/Signum.Entities/TimeZoneManager.cs
@@ -49,11 +49,6 @@ public static DateTime Now
 
     public static DateOnly Today => Now.ToDateOnly();
 
-    public static DateTime ToDateTimeAutoUTC(this DateOnly date)
-    {
-        return date.ToDateTime(new TimeOnly(), Mode == TimeZoneMode.Local ? DateTimeKind.Local : DateTimeKind.Utc);
-    }
-
     public static DateTime ToUserInterface(this DateTime dbDateTime)
     {
         if (Mode == TimeZoneMode.Local || dbDateTime.Kind == DateTimeKind.Local)
diff --git a/Signum.React/Signum.React.csproj b/Signum.React/Signum.React.csproj
index 40cfab3f2c..6a7906c89e 100644
--- a/Signum.React/Signum.React.csproj
+++ b/Signum.React/Signum.React.csproj
@@ -33,7 +33,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="Npgsql" Version="5.0.10" />
+    <PackageReference Include="Npgsql" Version="6.0.0" />
     <PackageReference Include="Signum.Analyzer" Version="3.2.0" />
     <PackageReference Include="Signum.TSGenerator" Version="6.0.0" />
   </ItemGroup>