diff --git a/pyproject.toml b/pyproject.toml
index e2797d9..5535374 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,6 +20,13 @@ dependencies = [
     'tomli>=1.1.0;python_version<"3.11"',
 ]
 
+[project.optional-dependencies]
+dev = [
+	"covdefaults",
+	"coverage",
+	"pytest",
+]
+
 [project.readme]
 file = "README.md"
 content-type = "text/markdown"
diff --git a/requirements-dev.txt b/requirements-dev.txt
deleted file mode 100644
index 0c5a37e..0000000
--- a/requirements-dev.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-covdefaults
-coverage
-pytest
diff --git a/tox.ini b/tox.ini
index 11340f4..b9b0c76 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,7 +2,7 @@
 envlist = py,pre-commit
 
 [testenv]
-deps = -rrequirements-dev.txt
+extras = dev
 setenv =
     GIT_AUTHOR_NAME = "test"
     GIT_COMMITTER_NAME = "test"