diff --git a/pyproject.toml b/pyproject.toml
index 6c86b5f7..3b5c9bd5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,7 +42,7 @@ Repository = "https://github.com/geo-engine/geoengine-python"
 
 [project.optional-dependencies] # TODO: use [dependency-groups] in the future
 dev = [
-    "build >=0.7,<1.3",
+    "build >=0.7,<1.4",
     "mypy >=1.14,<2.0",
     "pdoc3 >=0.10,<0.12",
     "ruff >=0.12.3,<0.13",         # formatter & linter