diff --git a/angel_orm_generator/CHANGELOG.md b/angel_orm_generator/CHANGELOG.md
index b987f5b6..33aab2bf 100644
--- a/angel_orm_generator/CHANGELOG.md
+++ b/angel_orm_generator/CHANGELOG.md
@@ -1,3 +1,6 @@
+# 1.0.0-alpha+6
+* `DateTime` is now `CAST` on insertion and update operations.
+
 # 1.0.0-alpha+3
 Implemented `@hasOne`, with tests. Still missing `@hasMany`.
 `belongsToMany` will likely be scrapped.
diff --git a/angel_orm_generator/lib/src/builder/orm/postgres.dart b/angel_orm_generator/lib/src/builder/orm/postgres.dart
index f4efeeea..860e5bd6 100644
--- a/angel_orm_generator/lib/src/builder/orm/postgres.dart
+++ b/angel_orm_generator/lib/src/builder/orm/postgres.dart
@@ -546,6 +546,14 @@ class PostgresOrmGenerator extends GeneratorForAnnotation<ORM> {
         namedArguments: {'substitutionValues': map(substitutionValues)});
   }
 
+  void printField(
+      PostgresBuildContext ctx, FieldElement field, StringBuffer buf) {
+    if (dateTimeTypeChecker.isAssignableFromType(field.type))
+      buf.write('CAST (@${field.name} AS ${ctx.columnInfo[field.name].type.name})');
+    else
+      buf.write('@${field.name}');
+  }
+
   MethodBuilder buildUpdateMethod(PostgresBuildContext ctx) {
     var meth = new MethodBuilder('update',
         returnType:
@@ -572,7 +580,7 @@ class PostgresOrmGenerator extends GeneratorForAnnotation<ORM> {
         return;
       else {
         if (i++ > 0) buf.write(', ');
-        buf.write('@${field.name}');
+        printField(ctx, field, buf);
       }
     });
     buf.write(') ');
@@ -678,7 +686,7 @@ class PostgresOrmGenerator extends GeneratorForAnnotation<ORM> {
         return;
       else {
         if (i++ > 0) buf.write(', ');
-        buf.write('@${field.name}');
+        printField(ctx, field, buf);
       }
     });
 
diff --git a/angel_orm_generator/pubspec.yaml b/angel_orm_generator/pubspec.yaml
index 57fb9a16..6dbc8a60 100644
--- a/angel_orm_generator/pubspec.yaml
+++ b/angel_orm_generator/pubspec.yaml
@@ -1,5 +1,5 @@
 name: angel_orm_generator
-version: 1.0.0-alpha+5
+version: 1.0.0-alpha+6
 description: Code generators for Angel's ORM.
 author: Tobe O <thosakwe@gmail.com>
 homepage: https://github.com/angel-dart/orm
diff --git a/angel_orm_generator/test/models/author.orm.g.dart b/angel_orm_generator/test/models/author.orm.g.dart
index 844ddd90..686525d2 100644
--- a/angel_orm_generator/test/models/author.orm.g.dart
+++ b/angel_orm_generator/test/models/author.orm.g.dart
@@ -122,7 +122,7 @@ class AuthorQuery {
   Stream<Author> update(PostgreSQLConnection connection,
       {String name: 'Tobe Osakwe', DateTime createdAt, DateTime updatedAt}) {
     var buf = new StringBuffer(
-        'UPDATE "authors" SET ("name", "created_at", "updated_at") = (@name, @createdAt, @updatedAt) ');
+        'UPDATE "authors" SET ("name", "created_at", "updated_at") = (@name, CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) ');
     var whereClause = where.toWhereClause();
     if (whereClause != null) {
       buf.write(whereClause);
@@ -176,7 +176,7 @@ class AuthorQuery {
       DateTime updatedAt}) async {
     var __ormNow__ = new DateTime.now();
     var result = await connection.query(
-        'INSERT INTO "authors" ("name", "created_at", "updated_at") VALUES (@name, @createdAt, @updatedAt) RETURNING "id", "name", "created_at", "updated_at";',
+        'INSERT INTO "authors" ("name", "created_at", "updated_at") VALUES (@name, CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) RETURNING "id", "name", "created_at", "updated_at";',
         substitutionValues: {
           'name': name,
           'createdAt': createdAt != null ? createdAt : __ormNow__,
diff --git a/angel_orm_generator/test/models/book.orm.g.dart b/angel_orm_generator/test/models/book.orm.g.dart
index c2b19115..0c0cc41c 100644
--- a/angel_orm_generator/test/models/book.orm.g.dart
+++ b/angel_orm_generator/test/models/book.orm.g.dart
@@ -130,7 +130,7 @@ class BookQuery {
   Stream<Book> update(PostgreSQLConnection connection,
       {String name, DateTime createdAt, DateTime updatedAt, int authorId}) {
     var buf = new StringBuffer(
-        'UPDATE "books" SET ("name", "created_at", "updated_at", "author_id") = (@name, @createdAt, @updatedAt, @authorId) ');
+        'UPDATE "books" SET ("name", "created_at", "updated_at", "author_id") = (@name, CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp), @authorId) ');
     var whereClause = where.toWhereClause();
     if (whereClause != null) {
       buf.write(whereClause);
@@ -189,7 +189,7 @@ class BookQuery {
       int authorId}) async {
     var __ormNow__ = new DateTime.now();
     var result = await connection.query(
-        'INSERT INTO "books" ("name", "created_at", "updated_at", "author_id") VALUES (@name, @createdAt, @updatedAt, @authorId) RETURNING "id", "name", "created_at", "updated_at", "author_id";',
+        'INSERT INTO "books" ("name", "created_at", "updated_at", "author_id") VALUES (@name, CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp), @authorId) RETURNING "id", "name", "created_at", "updated_at", "author_id";',
         substitutionValues: {
           'name': name,
           'createdAt': createdAt != null ? createdAt : __ormNow__,
diff --git a/angel_orm_generator/test/models/car.orm.g.dart b/angel_orm_generator/test/models/car.orm.g.dart
index 4b61e0ac..074df007 100644
--- a/angel_orm_generator/test/models/car.orm.g.dart
+++ b/angel_orm_generator/test/models/car.orm.g.dart
@@ -130,7 +130,7 @@ class CarQuery {
       DateTime createdAt,
       DateTime updatedAt}) {
     var buf = new StringBuffer(
-        'UPDATE "cars" SET ("make", "description", "family_friendly", "recalled_at", "created_at", "updated_at") = (@make, @description, @familyFriendly, @recalledAt, @createdAt, @updatedAt) ');
+        'UPDATE "cars" SET ("make", "description", "family_friendly", "recalled_at", "created_at", "updated_at") = (@make, @description, @familyFriendly, CAST (@recalledAt AS timestamp), CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) ');
     var whereClause = where.toWhereClause();
     if (whereClause != null) {
       buf.write(whereClause);
@@ -191,7 +191,7 @@ class CarQuery {
       DateTime updatedAt}) async {
     var __ormNow__ = new DateTime.now();
     var result = await connection.query(
-        'INSERT INTO "cars" ("make", "description", "family_friendly", "recalled_at", "created_at", "updated_at") VALUES (@make, @description, @familyFriendly, @recalledAt, @createdAt, @updatedAt) RETURNING "id", "make", "description", "family_friendly", "recalled_at", "created_at", "updated_at";',
+        'INSERT INTO "cars" ("make", "description", "family_friendly", "recalled_at", "created_at", "updated_at") VALUES (@make, @description, @familyFriendly, CAST (@recalledAt AS timestamp), CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) RETURNING "id", "make", "description", "family_friendly", "recalled_at", "created_at", "updated_at";',
         substitutionValues: {
           'make': make,
           'description': description,
diff --git a/angel_orm_generator/test/models/customer.orm.g.dart b/angel_orm_generator/test/models/customer.orm.g.dart
index 1a9437d5..9678e282 100644
--- a/angel_orm_generator/test/models/customer.orm.g.dart
+++ b/angel_orm_generator/test/models/customer.orm.g.dart
@@ -118,7 +118,7 @@ class CustomerQuery {
   Stream<Customer> update(PostgreSQLConnection connection,
       {DateTime createdAt, DateTime updatedAt}) {
     var buf = new StringBuffer(
-        'UPDATE "customers" SET ("created_at", "updated_at") = (@createdAt, @updatedAt) ');
+        'UPDATE "customers" SET ("created_at", "updated_at") = (CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) ');
     var whereClause = where.toWhereClause();
     if (whereClause != null) {
       buf.write(whereClause);
@@ -169,7 +169,7 @@ class CustomerQuery {
       {DateTime createdAt, DateTime updatedAt}) async {
     var __ormNow__ = new DateTime.now();
     var result = await connection.query(
-        'INSERT INTO "customers" ("created_at", "updated_at") VALUES (@createdAt, @updatedAt) RETURNING "id", "created_at", "updated_at";',
+        'INSERT INTO "customers" ("created_at", "updated_at") VALUES (CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) RETURNING "id", "created_at", "updated_at";',
         substitutionValues: {
           'createdAt': createdAt != null ? createdAt : __ormNow__,
           'updatedAt': updatedAt != null ? updatedAt : __ormNow__
diff --git a/angel_orm_generator/test/models/foot.orm.g.dart b/angel_orm_generator/test/models/foot.orm.g.dart
index c2869ff2..62ef4f39 100644
--- a/angel_orm_generator/test/models/foot.orm.g.dart
+++ b/angel_orm_generator/test/models/foot.orm.g.dart
@@ -123,7 +123,7 @@ class FootQuery {
   Stream<Foot> update(PostgreSQLConnection connection,
       {int legId, int nToes, DateTime createdAt, DateTime updatedAt}) {
     var buf = new StringBuffer(
-        'UPDATE "foots" SET ("leg_id", "n_toes", "created_at", "updated_at") = (@legId, @nToes, @createdAt, @updatedAt) ');
+        'UPDATE "foots" SET ("leg_id", "n_toes", "created_at", "updated_at") = (@legId, @nToes, CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) ');
     var whereClause = where.toWhereClause();
     if (whereClause != null) {
       buf.write(whereClause);
@@ -177,7 +177,7 @@ class FootQuery {
       {int legId, int nToes, DateTime createdAt, DateTime updatedAt}) async {
     var __ormNow__ = new DateTime.now();
     var result = await connection.query(
-        'INSERT INTO "foots" ("leg_id", "n_toes", "created_at", "updated_at") VALUES (@legId, @nToes, @createdAt, @updatedAt) RETURNING "id", "leg_id", "n_toes", "created_at", "updated_at";',
+        'INSERT INTO "foots" ("leg_id", "n_toes", "created_at", "updated_at") VALUES (@legId, @nToes, CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) RETURNING "id", "leg_id", "n_toes", "created_at", "updated_at";',
         substitutionValues: {
           'legId': legId,
           'nToes': nToes,
diff --git a/angel_orm_generator/test/models/fruit.orm.g.dart b/angel_orm_generator/test/models/fruit.orm.g.dart
index a0a613b5..43ade1ea 100644
--- a/angel_orm_generator/test/models/fruit.orm.g.dart
+++ b/angel_orm_generator/test/models/fruit.orm.g.dart
@@ -123,7 +123,7 @@ class FruitQuery {
   Stream<Fruit> update(PostgreSQLConnection connection,
       {int treeId, String commonName, DateTime createdAt, DateTime updatedAt}) {
     var buf = new StringBuffer(
-        'UPDATE "fruits" SET ("tree_id", "common_name", "created_at", "updated_at") = (@treeId, @commonName, @createdAt, @updatedAt) ');
+        'UPDATE "fruits" SET ("tree_id", "common_name", "created_at", "updated_at") = (@treeId, @commonName, CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) ');
     var whereClause = where.toWhereClause();
     if (whereClause != null) {
       buf.write(whereClause);
@@ -180,7 +180,7 @@ class FruitQuery {
       DateTime updatedAt}) async {
     var __ormNow__ = new DateTime.now();
     var result = await connection.query(
-        'INSERT INTO "fruits" ("tree_id", "common_name", "created_at", "updated_at") VALUES (@treeId, @commonName, @createdAt, @updatedAt) RETURNING "id", "tree_id", "common_name", "created_at", "updated_at";',
+        'INSERT INTO "fruits" ("tree_id", "common_name", "created_at", "updated_at") VALUES (@treeId, @commonName, CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) RETURNING "id", "tree_id", "common_name", "created_at", "updated_at";',
         substitutionValues: {
           'treeId': treeId,
           'commonName': commonName,
diff --git a/angel_orm_generator/test/models/leg.orm.g.dart b/angel_orm_generator/test/models/leg.orm.g.dart
index 492f73d2..5b6c4865 100644
--- a/angel_orm_generator/test/models/leg.orm.g.dart
+++ b/angel_orm_generator/test/models/leg.orm.g.dart
@@ -133,7 +133,7 @@ class LegQuery {
   Stream<Leg> update(PostgreSQLConnection connection,
       {String name, DateTime createdAt, DateTime updatedAt}) {
     var buf = new StringBuffer(
-        'UPDATE "legs" SET ("name", "created_at", "updated_at") = (@name, @createdAt, @updatedAt) ');
+        'UPDATE "legs" SET ("name", "created_at", "updated_at") = (@name, CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) ');
     var whereClause = where.toWhereClause();
     if (whereClause != null) {
       buf.write(whereClause);
@@ -193,7 +193,7 @@ class LegQuery {
       {String name, DateTime createdAt, DateTime updatedAt}) async {
     var __ormNow__ = new DateTime.now();
     var result = await connection.query(
-        'INSERT INTO "legs" ("name", "created_at", "updated_at") VALUES (@name, @createdAt, @updatedAt) RETURNING "id", "name", "created_at", "updated_at";',
+        'INSERT INTO "legs" ("name", "created_at", "updated_at") VALUES (@name, CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) RETURNING "id", "name", "created_at", "updated_at";',
         substitutionValues: {
           'name': name,
           'createdAt': createdAt != null ? createdAt : __ormNow__,
diff --git a/angel_orm_generator/test/models/order.orm.g.dart b/angel_orm_generator/test/models/order.orm.g.dart
index 8b7afd26..476c800e 100644
--- a/angel_orm_generator/test/models/order.orm.g.dart
+++ b/angel_orm_generator/test/models/order.orm.g.dart
@@ -130,7 +130,7 @@ class OrderQuery {
       DateTime createdAt,
       DateTime updatedAt}) {
     var buf = new StringBuffer(
-        'UPDATE "orders" SET ("customer_id", "employee_id", "order_date", "shipper_id", "created_at", "updated_at") = (@customerId, @employeeId, @orderDate, @shipperId, @createdAt, @updatedAt) ');
+        'UPDATE "orders" SET ("customer_id", "employee_id", "order_date", "shipper_id", "created_at", "updated_at") = (@customerId, @employeeId, CAST (@orderDate AS timestamp), @shipperId, CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) ');
     var whereClause = where.toWhereClause();
     if (whereClause != null) {
       buf.write(whereClause);
@@ -191,7 +191,7 @@ class OrderQuery {
       DateTime updatedAt}) async {
     var __ormNow__ = new DateTime.now();
     var result = await connection.query(
-        'INSERT INTO "orders" ("customer_id", "employee_id", "order_date", "shipper_id", "created_at", "updated_at") VALUES (@customerId, @employeeId, @orderDate, @shipperId, @createdAt, @updatedAt) RETURNING "id", "customer_id", "employee_id", "order_date", "shipper_id", "created_at", "updated_at";',
+        'INSERT INTO "orders" ("customer_id", "employee_id", "order_date", "shipper_id", "created_at", "updated_at") VALUES (@customerId, @employeeId, CAST (@orderDate AS timestamp), @shipperId, CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) RETURNING "id", "customer_id", "employee_id", "order_date", "shipper_id", "created_at", "updated_at";',
         substitutionValues: {
           'customerId': customerId,
           'employeeId': employeeId,
@@ -233,8 +233,7 @@ class OrderQuery {
   static Stream<Order> getAll(PostgreSQLConnection connection) =>
       new OrderQuery().get(connection);
 
-  static joinCustomers(PostgreSQLConnection connection) {
-  }
+  static joinCustomers(PostgreSQLConnection connection) {}
 }
 
 class OrderQueryWhere {
diff --git a/angel_orm_generator/test/models/role.orm.g.dart b/angel_orm_generator/test/models/role.orm.g.dart
index 7e0e9b43..9a0486ec 100644
--- a/angel_orm_generator/test/models/role.orm.g.dart
+++ b/angel_orm_generator/test/models/role.orm.g.dart
@@ -122,7 +122,7 @@ class RoleQuery {
   Stream<Role> update(PostgreSQLConnection connection,
       {String name, DateTime createdAt, DateTime updatedAt}) {
     var buf = new StringBuffer(
-        'UPDATE "roles" SET ("name", "created_at", "updated_at") = (@name, @createdAt, @updatedAt) ');
+        'UPDATE "roles" SET ("name", "created_at", "updated_at") = (@name, CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) ');
     var whereClause = where.toWhereClause();
     if (whereClause != null) {
       buf.write(whereClause);
@@ -174,7 +174,7 @@ class RoleQuery {
       {String name, DateTime createdAt, DateTime updatedAt}) async {
     var __ormNow__ = new DateTime.now();
     var result = await connection.query(
-        'INSERT INTO "roles" ("name", "created_at", "updated_at") VALUES (@name, @createdAt, @updatedAt) RETURNING "id", "name", "created_at", "updated_at";',
+        'INSERT INTO "roles" ("name", "created_at", "updated_at") VALUES (@name, CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) RETURNING "id", "name", "created_at", "updated_at";',
         substitutionValues: {
           'name': name,
           'createdAt': createdAt != null ? createdAt : __ormNow__,
diff --git a/angel_orm_generator/test/models/tree.orm.g.dart b/angel_orm_generator/test/models/tree.orm.g.dart
index ccae50c2..b21951cd 100644
--- a/angel_orm_generator/test/models/tree.orm.g.dart
+++ b/angel_orm_generator/test/models/tree.orm.g.dart
@@ -131,7 +131,7 @@ class TreeQuery {
   Stream<Tree> update(PostgreSQLConnection connection,
       {int rings, DateTime createdAt, DateTime updatedAt}) {
     var buf = new StringBuffer(
-        'UPDATE "trees" SET ("rings", "created_at", "updated_at") = (@rings, @createdAt, @updatedAt) ');
+        'UPDATE "trees" SET ("rings", "created_at", "updated_at") = (@rings, CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) ');
     var whereClause = where.toWhereClause();
     if (whereClause != null) {
       buf.write(whereClause);
@@ -192,7 +192,7 @@ class TreeQuery {
       {int rings, DateTime createdAt, DateTime updatedAt}) async {
     var __ormNow__ = new DateTime.now();
     var result = await connection.query(
-        'INSERT INTO "trees" ("rings", "created_at", "updated_at") VALUES (@rings, @createdAt, @updatedAt) RETURNING "id", "rings", "created_at", "updated_at";',
+        'INSERT INTO "trees" ("rings", "created_at", "updated_at") VALUES (@rings, CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) RETURNING "id", "rings", "created_at", "updated_at";',
         substitutionValues: {
           'rings': rings,
           'createdAt': createdAt != null ? createdAt : __ormNow__,
diff --git a/angel_orm_generator/test/models/user.orm.g.dart b/angel_orm_generator/test/models/user.orm.g.dart
index c4dc3913..b074722d 100644
--- a/angel_orm_generator/test/models/user.orm.g.dart
+++ b/angel_orm_generator/test/models/user.orm.g.dart
@@ -135,7 +135,7 @@ class UserQuery {
       DateTime createdAt,
       DateTime updatedAt}) {
     var buf = new StringBuffer(
-        'UPDATE "users" SET ("username", "password", "email", "created_at", "updated_at") = (@username, @password, @email, @createdAt, @updatedAt) ');
+        'UPDATE "users" SET ("username", "password", "email", "created_at", "updated_at") = (@username, @password, @email, CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) ');
     var whereClause = where.toWhereClause();
     if (whereClause != null) {
       buf.write(whereClause);
@@ -200,7 +200,7 @@ class UserQuery {
       DateTime updatedAt}) async {
     var __ormNow__ = new DateTime.now();
     var result = await connection.query(
-        'INSERT INTO "users" ("username", "password", "email", "created_at", "updated_at") VALUES (@username, @password, @email, @createdAt, @updatedAt) RETURNING "id", "username", "password", "email", "created_at", "updated_at";',
+        'INSERT INTO "users" ("username", "password", "email", "created_at", "updated_at") VALUES (@username, @password, @email, CAST (@createdAt AS timestamp), CAST (@updatedAt AS timestamp)) RETURNING "id", "username", "password", "email", "created_at", "updated_at";',
         substitutionValues: {
           'username': username,
           'password': password,