diff --git a/.github/workflows/pythonpackage.yaml b/.github/workflows/pythonpackage.yaml
index 4433945..c1a1846 100644
--- a/.github/workflows/pythonpackage.yaml
+++ b/.github/workflows/pythonpackage.yaml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
         platform: [ubuntu-latest, macos-latest] #, windows-latest]
         
     runs-on: ${{ matrix.platform }}
diff --git a/README.md b/README.md
index 8a1e398..d9c4cbc 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-[![Python: 3.9, 3.10, 3.11, 3.12](https://img.shields.io/badge/python-3.9%20%7C%203.10%20%7C%203.11%20%7C%203.12-blue)](https://www.python.org)
+[![Python: 3.8, 3.9, 3.10, 3.11, 3.12](https://img.shields.io/badge/python-3.8%20%7C%203.9%20%7C%203.10%20%7C%203.11%20%7C%203.12-blue)](https://www.python.org)
 ![GitHub](https://img.shields.io/github/license/agrenott/pyhgtmap)
 ![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/agrenott/pyhgtmap/pythonpackage.yaml)
 [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
diff --git a/pyhgtmap/hgt/file.py b/pyhgtmap/hgt/file.py
index d28f349..0dc9c94 100644
--- a/pyhgtmap/hgt/file.py
+++ b/pyhgtmap/hgt/file.py
@@ -244,7 +244,7 @@ def polygon_mask(
     which is the projection used within polygon files.
     """
     X, Y = numpy.meshgrid(x_data, y_data)
-    xyPoints: Iterable[tuple[float, float]] = numpy.vstack(([X.T], [Y.T])).T.reshape(
+    xyPoints: Iterable[Tuple[float, float]] = numpy.vstack(([X.T], [Y.T])).T.reshape(
         len(x_data) * len(y_data), 2
     )
 
diff --git a/pyhgtmap/output/pbfUtil.py b/pyhgtmap/output/pbfUtil.py
index 8bad03f..111b8f1 100644
--- a/pyhgtmap/output/pbfUtil.py
+++ b/pyhgtmap/output/pbfUtil.py
@@ -76,7 +76,7 @@ def _write_ways(self, ways: pyhgtmap.output.WaysType, startWayId) -> None:
         The waylist is split up to make sure the pbf blobs will not be too big.
         """
         for ind, way in enumerate(ways):
-            closed_loop_id: list[int] = (
+            closed_loop_id: List[int] = (
                 [way["first_node_id"]] if way["closed_loop"] else []
             )
             osm_way = npyosmium.osm.mutable.Way(
diff --git a/pyhgtmap/sources/sonny.py b/pyhgtmap/sources/sonny.py
index 67a2da9..697e612 100644
--- a/pyhgtmap/sources/sonny.py
+++ b/pyhgtmap/sources/sonny.py
@@ -1,7 +1,7 @@
 import io
 import os
 import pathlib
-from typing import List, Optional, cast
+from typing import Dict, List, Optional, cast
 from zipfile import ZipFile
 
 from pydrive2.auth import GoogleAuth
@@ -22,7 +22,7 @@ class Sonny(Source):
 
     # Root Sonny's Google Drive folders IDs for Europe DTMs, for various resolutions
     # TODO: does this change often? Should it be configurable/self-discovered from website?
-    FOLDER_IDS: dict[int, str] = {
+    FOLDER_IDS: Dict[int, str] = {
         1: "0BxphPoRgwhnoWkRoTFhMbTM3RDA",
         3: "0BxphPoRgwhnoekRQZUZJT2ZRX2M",
     }
diff --git a/pyproject.toml b/pyproject.toml
index c5dceee..e6daef1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,7 +38,7 @@ keywords = ["osm", "OpenStreetMap", "countour", "SRTM", "elevation"]
 license = "GPL-2.0-or-later"
 name = "pyhgtmap"
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.8"
 
 [project.optional-dependencies]
 geotiff = [
@@ -92,7 +92,7 @@ test_cov = [
 typing = "mypy {args}"
 
 [[tool.hatch.envs.test.matrix]]
-python = ["3.9", "3.10", "3.11", "3.12"]
+python = ["3.8", "3.9", "3.10", "3.11", "3.12"]
 
 [tool.hatch.envs.geotiff]
 # Env for optional geotiff dependencies
diff --git a/tests/hgt/test_processor.py b/tests/hgt/test_processor.py
index 9616956..b1b8089 100644
--- a/tests/hgt/test_processor.py
+++ b/tests/hgt/test_processor.py
@@ -182,7 +182,7 @@ def _test_process_files(nb_jobs: int, options) -> None:
                 # Instrument method without changing its behavior
                 processor.process_tile_internal = Mock(side_effect=processor.process_tile_internal)  # type: ignore
                 processor.process_files(files_list)
-                out_files_names: list[str] = sorted(glob.glob("*.osm.pbf"))
+                out_files_names: List[str] = sorted(glob.glob("*.osm.pbf"))
                 # We may have more files generated (eg. .coverage ones)
                 assert out_files_names == [
                     "lon6.00_7.00lat43.00_43.50_local-source.osm.pbf",
@@ -253,7 +253,7 @@ def _test_process_files_single_output(nb_jobs: int, options) -> None:
                 # Instrument method without changing its behavior
                 processor.process_tile_internal = Mock(side_effect=processor.process_tile_internal)  # type: ignore
                 processor.process_files(files_list)
-                out_files_names: list[str] = sorted(glob.glob("*.osm.pbf"))
+                out_files_names: List[str] = sorted(glob.glob("*.osm.pbf"))
                 # We may have more files generated (eg. .coverage ones)
                 assert out_files_names == [
                     "lon6.00_8.00lat43.00_44.00_local-source.osm.pbf",