diff --git a/dev-requirements.txt b/dev-requirements.txt
new file mode 100644
index 0000000..3e695a0
--- /dev/null
+++ b/dev-requirements.txt
@@ -0,0 +1,2 @@
+black~=23.10.1
+pytest~=4.1.0
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index 631cdb5..903931f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,10 +6,6 @@ authors = [
     {name = "luoshuijs", email = "luoshuijs@outlook.com"},
     {name = "kotori", email = "minamiktr@outlook.com"}
 ]
-dev-dependencies = [
-    "black~=23.10.1"
-]
-# todo : about to be removed
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Environment :: Console",