diff --git a/pyproject.toml b/pyproject.toml
index ec7cb0e..9eac3c5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,7 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
 [project]
 authors = [{name = "LORES"}]
 classifiers = [
@@ -12,7 +16,6 @@ dependencies = [
   "stollen>=0.6.8",
 ]
 description = "A lightweight NotLetters SDK based on stollen."
-dynamic = ["version"]
 keywords = [
   "letters",
   "mails",
@@ -22,6 +25,7 @@ keywords = [
 license-files = ["LICENSE"]
 name = "notletters"
 readme = "README.md"
+version = "0.1.1"
 requires-python = ">=3.9"
 
 [project.urls]