diff --git a/pyproject.toml b/pyproject.toml
index 5349258..485768b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,7 @@ dependencies = [
 [project.optional-dependencies]
 dev = [
     "black==25.11.0",
-    "build==1.3.0",
+    "build==1.4.0",
     "mypy==1.19.1",
     "pytest==8.4.2",
     "pytest-cov==7.0.0",