diff --git a/.gitignore b/.gitignore
index c5da25c..aba99db 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
+__pycache__/
+build/
 *.egg-info/
 *.svg
-__pycache__/
 benchmark-results/
 condaenv.*.requirements.txt
 node_modules/
diff --git a/pyproject.toml b/pyproject.toml
index 3be11fc..ecc73d8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,8 +18,6 @@ classifiers = [
     "Operating System :: OS Independent",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
-    "Programming Language :: Python :: 3.7",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python",
     "Topic :: Software Development",
@@ -27,7 +25,6 @@ classifiers = [
 ]
 dependencies = [
     "PyYAML",
-    "importlib-metadata; python_version<'3.8.0'",
     "jax",
     "jaxlib",
     "matplotlib",
@@ -50,7 +47,7 @@ maintainers = [
     {name = "Common Partial Wave Analysis", email = "compwa-admin@ep1.rub.de"},
 ]
 name = "jax-mini-benchmark"
-requires-python = ">=3.7"
+requires-python = ">=3.9"
 
 [project.optional-dependencies]
 dev = [
@@ -119,7 +116,7 @@ extend-include = ["*.ipynb"]
 preview = true
 show-fixes = true
 src = ["src"]
-target-version = "py37"
+target-version = "py39"
 
 [tool.ruff.format]
 docstring-code-format = true
diff --git a/src/jax_benchmark/io.py b/src/jax_benchmark/io.py
index 8d30dcc..5bc8bbf 100644
--- a/src/jax_benchmark/io.py
+++ b/src/jax_benchmark/io.py
@@ -1,15 +1,10 @@
 import logging
 import os
 import socket
-import sys
+from importlib.metadata import version
 
 import cpuinfo
 
-if sys.version_info < (3, 8):
-    from importlib_metadata import version
-else:
-    from importlib.metadata import version
-
 
 def enable_x64() -> None:
     import jax