diff --git a/pyproject.toml b/pyproject.toml
index 0bba6c8..f5f839a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,6 +14,7 @@ dependencies = [
 [project.optional-dependencies]
 build = [
     "build",
+    "twine",
 ]
 test = [
     "ohlc",