diff --git a/raillabel/filter/filter.py b/raillabel/filter/filter.py
index e3ee76e..283dffa 100644
--- a/raillabel/filter/filter.py
+++ b/raillabel/filter/filter.py
@@ -5,7 +5,8 @@
 import typing as t
 from warnings import warn
 
-from typing_extensions import deprecated
+if t.TYPE_CHECKING:
+    from typing_extensions import deprecated
 
 from .. import format
 from . import _filter_classes
diff --git a/raillabel/stats/generate_timespan.py b/raillabel/stats/generate_timespan.py
index 5847c31..af85c3e 100644
--- a/raillabel/stats/generate_timespan.py
+++ b/raillabel/stats/generate_timespan.py
@@ -5,7 +5,8 @@
 from decimal import Decimal
 from warnings import warn
 
-from typing_extensions import deprecated
+if t.TYPE_CHECKING:
+    from typing_extensions import deprecated
 
 from ..format import Scene
 
diff --git a/raillabel/validate/validate.py b/raillabel/validate/validate.py
index 55c01cf..97057df 100644
--- a/raillabel/validate/validate.py
+++ b/raillabel/validate/validate.py
@@ -9,7 +9,9 @@
 
 import fastjsonschema
 import jsonschema
-from typing_extensions import deprecated
+
+if t.TYPE_CHECKING:
+    from typing_extensions import deprecated
 
 from .. import exceptions