diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 72dd1f9..0bc414c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -16,7 +16,6 @@ jobs:
       runs-on: |
         linux: ubuntu-22.04
       envs: |
-        - linux: py38-test-numpy118
         - linux: py39-test-numpy119
         - linux: py39-test-numpy120
         - linux: py39-test-numpy121
@@ -28,7 +27,6 @@ jobs:
         - linux: py311-test-numpy20
         - linux: py312-test-numpydev
 
-        - macos: py38-test-numpy118
         - macos: py39-test-numpy119
         - macos: py39-test-numpy120
         - macos: py39-test-numpy121
@@ -39,7 +37,6 @@ jobs:
         - macos: py311-test-numpy126
         - macos: py311-test-numpy20
 
-        - windows: py38-test-numpy118
         - windows: py39-test-numpy119
         - windows: py39-test-numpy120
         - windows: py39-test-numpy121
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index c2d2a7f..666ff5c 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -21,7 +21,7 @@ repos:
     rev: v3.15.2
     hooks:
       - id: pyupgrade
-        args: ["--py38-plus"]
+        args: ["--py39-plus"]
 
   - repo: https://github.com/psf/black
     rev: 24.4.0
diff --git a/fast_histogram/_histogram_core.c b/fast_histogram/_histogram_core.c
index 928ea0f..3551549 100644
--- a/fast_histogram/_histogram_core.c
+++ b/fast_histogram/_histogram_core.c
@@ -1,5 +1,5 @@
 #define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION
-#define Py_LIMITED_API 0x030800f0
+#define Py_LIMITED_API 0x030900f0
 
 #include <Python.h>
 #include <numpy/arrayobject.h>
diff --git a/pyproject.toml b/pyproject.toml
index e9e235e..707caf4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,8 +1,7 @@
 [build-system]
 requires = ["setuptools",
             "setuptools_scm",
-            "oldest-supported-numpy;python_version<'3.9'",
-            "numpy>=2.0.0rc1;python_version>='3.9'"]
+            "numpy>=2.0.0rc1"]
 build-backend = 'setuptools.build_meta'
 
 [tool.cibuildwheel.linux]
diff --git a/setup.cfg b/setup.cfg
index bd42465..b57b67c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -12,7 +12,7 @@ zip_safe = False
 packages = find:
 install_requires =
     numpy
-python_requires = >=3.8
+python_requires = >=3.9
 
 [options.extras_require]
 test =
@@ -20,4 +20,4 @@ test =
     hypothesis[numpy]
 
 [bdist_wheel]
-py_limited_api = cp38
+py_limited_api = cp39
diff --git a/tox.ini b/tox.ini
index 522304c..8e2c00d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py{38,39,310,311,312}-test{-numpy118,-numpy119,-numpy120,-numpy121,-numpy122,-numpy123,-numpy124,-numpy125,-numpy126,-numpy20,-numpydev}
+    py{39,310,311,312}-test{-numpy118,-numpy119,-numpy120,-numpy121,-numpy122,-numpy123,-numpy124,-numpy125,-numpy126,-numpy20,-numpydev}
 requires =
     setuptools >= 30.3.0
     pip >= 19.3.1