diff --git a/miniscope_io/models/pipeline.py b/miniscope_io/models/pipeline.py
index 90671e6..585fdbd 100644
--- a/miniscope_io/models/pipeline.py
+++ b/miniscope_io/models/pipeline.py
@@ -2,14 +2,20 @@
 Base ABCs for pipeline classes
 """
 
+import sys
 from abc import abstractmethod
-from typing import ClassVar, Final, Generic, Self, TypeVar, Union, final
+from typing import ClassVar, Final, Generic, TypeVar, Union, final
 
 from pydantic import Field
 
 from miniscope_io.exceptions import ConfigurationMismatchError
 from miniscope_io.models.models import MiniscopeConfig, PipelineModel
 
+if sys.version_info < (3, 11):
+    from typing_extensions import Self
+else:
+    from typing import Self
+
 T = TypeVar("T")
 """
 Input Type typevar
diff --git a/pdm.lock b/pdm.lock
index e08a0b6..37b10e8 100644
--- a/pdm.lock
+++ b/pdm.lock
@@ -5,7 +5,7 @@
 groups = ["default", "all", "dev", "docs", "plot", "tests"]
 strategy = ["inherit_metadata"]
 lock_version = "4.5.0"
-content_hash = "sha256:a090620ba52a1d2d377e7126f7c6bb98207af0ca2de9354c8bfd58828d4c745d"
+content_hash = "sha256:cda0e212515e3067b27276916a7033214752eadea01b3513953b8dca9e20cbc9"
 
 [[metadata.targets]]
 requires_python = "~=3.9"
diff --git a/pyproject.toml b/pyproject.toml
index 34e14b3..a045c4a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,6 +20,7 @@ dependencies = [
     "rich>=13.6.0",
     "pyyaml>=6.0.1",
     "click>=8.1.7",
+    "typing-extensions>=4.12.2; python_version<'3.11'",
 ]
 
 readme = "README.md"
@@ -119,7 +120,7 @@ omit = [
 ]
 
 [tool.ruff]
-target-version = "py311"
+target-version = "py39"
 include = ["miniscope_io/**/*.py", "pyproject.toml"]
 exclude = ["docs", "tests", "miniscope_io/vendor", "noxfile.py"]
 line-length = 100