diff --git a/.github/workflows/test-python.yml b/.github/workflows/test-python.yml
index f2c900e5c..6634bf5fc 100644
--- a/.github/workflows/test-python.yml
+++ b/.github/workflows/test-python.yml
@@ -82,6 +82,7 @@ jobs:
           expressions.tests.ExpressionsTests.test_insensitive_patterns_escape
           expressions.tests.ExpressionsTests.test_patterns_escape
           expressions.tests.FieldTransformTests.test_transform_in_values
+          expressions.tests.FTimeDeltaTests.test_date_minus_duration
           expressions.tests.NegatedExpressionTests
           expressions_case
           defer
diff --git a/README.md b/README.md
index 0be92b04e..7fe76a1e7 100644
--- a/README.md
+++ b/README.md
@@ -118,7 +118,8 @@ Migrations for 'admin':
 
 - Queries with joins aren't supported.
 
-- `DateTimeField` doesn't support microsecond precision.
+- `DateTimeField` doesn't support microsecond precision, and correspondingly,
+  `DurationField` stores milliseconds rather than microseconds.
 
 - The following database functions aren't supported:
     - `Chr`
diff --git a/django_mongodb/expressions.py b/django_mongodb/expressions.py
index fbda1eb99..f08e6c666 100644
--- a/django_mongodb/expressions.py
+++ b/django_mongodb/expressions.py
@@ -70,6 +70,9 @@ def value(self, compiler, connection):  # noqa: ARG001
     elif isinstance(value, datetime.date):
         # Turn dates into datetimes since BSON doesn't support dates.
         value = datetime.datetime.combine(value, datetime.datetime.min.time())
+    elif isinstance(value, datetime.timedelta):
+        # DurationField stores milliseconds rather than microseconds.
+        value /= datetime.timedelta(milliseconds=1)
     return {"$literal": value}
 
 
diff --git a/django_mongodb/fields/__init__.py b/django_mongodb/fields/__init__.py
index eaaee9548..0c5531b89 100644
--- a/django_mongodb/fields/__init__.py
+++ b/django_mongodb/fields/__init__.py
@@ -1,8 +1,10 @@
 from .auto import MongoAutoField
+from .duration import register_duration_field
 from .json import register_json_field
 
 __all__ = ["register_fields", "MongoAutoField"]
 
 
 def register_fields():
+    register_duration_field()
     register_json_field()
diff --git a/django_mongodb/fields/duration.py b/django_mongodb/fields/duration.py
new file mode 100644
index 000000000..cd0fd551d
--- /dev/null
+++ b/django_mongodb/fields/duration.py
@@ -0,0 +1,15 @@
+from django.db.models.fields import DurationField
+
+_get_db_prep_value = DurationField.get_db_prep_value
+
+
+def get_db_prep_value(self, value, connection, prepared=False):
+    """DurationField stores milliseconds rather than microseconds."""
+    value = _get_db_prep_value(self, value, connection, prepared)
+    if connection.vendor == "mongodb" and value is not None:
+        value //= 1000
+    return value
+
+
+def register_duration_field():
+    DurationField.get_db_prep_value = get_db_prep_value
diff --git a/django_mongodb/operations.py b/django_mongodb/operations.py
index 87dd92819..ffc53d387 100644
--- a/django_mongodb/operations.py
+++ b/django_mongodb/operations.py
@@ -101,6 +101,11 @@ def convert_decimalfield_value(self, value, expression, connection):
             value = value.to_decimal()
         return value
 
+    def convert_durationfield_value(self, value, expression, connection):
+        if value is not None:
+            value = datetime.timedelta(milliseconds=value)
+        return value
+
     def convert_jsonfield_value(self, value, expression, connection):
         """
         Convert dict data to a string so that JSONField.from_db_value() can