diff --git a/aiida_submission_controller/base.py b/aiida_submission_controller/base.py
index 3a51bcb..c108147 100644
--- a/aiida_submission_controller/base.py
+++ b/aiida_submission_controller/base.py
@@ -6,7 +6,7 @@
 
 from aiida import engine, orm
 from aiida.common import NotExistent
-from pydantic import BaseModel, validator
+from pydantic import BaseModel, field_validator
 from rich import print
 from rich.console import Console
 from rich.table import Table
@@ -56,12 +56,16 @@ class BaseSubmissionController(BaseModel):
     unique_extra_keys: Optional[tuple] = None
     """Tuple of keys defined in the extras that uniquely define each process to be run."""
 
-    _validate_group_exists = validator("group_label", allow_reuse=True)(validate_group_exists)
+    @field_validator('group_label')
+    @classmethod
+    def validate_group_exists(cls, value: str) -> str:
+        """Validator that makes sure the ``Group`` with the provided label exists."""
+        return validate_group_exists(value)
 
     @property
     def group(self):
         """Return the AiiDA ORM Group instance that is managed by this class."""
-        return orm.Group.objects.get(label=self.group_label)
+        return orm.Group.collection.get(label=self.group_label)
 
     def get_query(self, process_projections, only_active=False):
         """Return a QueryBuilder object to get all processes in the group associated to this.
@@ -236,7 +240,7 @@ def submit_new_batch(self, dry_run=False, sort=False, verbose=False):
             else:
                 CMDLINE_LOGGER.report(f"Submitted work chain <{wc_node}> for extras <{workchain_extras}>.")
 
-                wc_node.set_extra_many(get_extras_dict(self.get_extra_unique_keys(), workchain_extras))
+                wc_node.base.extras.set_many(get_extras_dict(self.get_extra_unique_keys(), workchain_extras))
                 self.group.add_nodes([wc_node])
                 submitted[workchain_extras] = wc_node
 
diff --git a/aiida_submission_controller/from_group.py b/aiida_submission_controller/from_group.py
index 1eea6a2..368e0d3 100644
--- a/aiida_submission_controller/from_group.py
+++ b/aiida_submission_controller/from_group.py
@@ -3,7 +3,7 @@
 from typing import Optional
 
 from aiida import orm
-from pydantic import validator
+from pydantic import field_validator
 
 from .base import BaseSubmissionController, validate_group_exists
 
@@ -22,12 +22,16 @@ class FromGroupSubmissionController(BaseSubmissionController):  # pylint: disabl
     order_by: Optional[dict] = None
     """Ordering applied to the query of the nodes in the parent group."""
 
-    _validate_group_exists = validator("parent_group_label", allow_reuse=True)(validate_group_exists)
+    @field_validator('parent_group_label')
+    @classmethod
+    def validate_parent_group_exists(cls, value: str) -> str:
+        """Validator that makes sure the parent ``Group`` with the provided label exists."""
+        return validate_group_exists(value)
 
     @property
     def parent_group(self):
         """Return the AiiDA ORM Group instance of the parent group."""
-        return orm.Group.objects.get(label=self.parent_group_label)
+        return orm.Group.collection.get(label=self.parent_group_label)
 
     def get_parent_node_from_extras(self, extras_values):
         """Return the Node instance (in the parent group) from the (unique) extras identifying it."""
diff --git a/examples/add_in_batches.py b/examples/add_in_batches.py
index 7b362c6..c9ce9e2 100644
--- a/examples/add_in_batches.py
+++ b/examples/add_in_batches.py
@@ -4,7 +4,7 @@
 
 from aiida import orm
 from aiida.calculations.arithmetic.add import ArithmeticAddCalculation
-from pydantic import validator
+from pydantic import field_validator
 
 from aiida_submission_controller import BaseSubmissionController
 
@@ -15,7 +15,8 @@ class AdditionTableSubmissionController(BaseSubmissionController):
     code_label: str
     """Label of the `code.arithmetic.add` `Code`."""
 
-    @validator("code_label")
+    @field_validator("code_label")
+    @classmethod
     def _check_code_plugin(cls, value):
         plugin_type = orm.load_code(value).default_calc_job_plugin
         if plugin_type == "core.arithmetic.add":
@@ -64,7 +65,7 @@ def main():
     ##  verdi code setup -L add --on-computer --computer=localhost -P core.arithmetic.add --remote-abs-path=/bin/bash -n
     # Create a controller
 
-    group, _ = orm.Group.objects.get_or_create(label="tests/addition_table")
+    group, _ = orm.Group.collection.get_or_create(label="tests/addition_table")
 
     controller = AdditionTableSubmissionController(
         code_label="add@localhost",
diff --git a/pyproject.toml b/pyproject.toml
index 0b85b55..ba8a44e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,8 +27,8 @@ classifiers = [
 requires-python = ">=3.6"
 
 dependencies = [
-    "aiida-core>=1.0",
-    "pydantic~=1.10.4",
+    "aiida-core>=2.0",
+    "pydantic~=2.7",
     "rich",
 ]