diff --git a/junitparser/__init__.py b/junitparser/__init__.py
index f744a84..bd91712 100644
--- a/junitparser/__init__.py
+++ b/junitparser/__init__.py
@@ -14,4 +14,4 @@
     FloatAttr,
 )
 
-version = "2.4.1"
+version = "2.4.2"
diff --git a/pyproject.toml b/pyproject.toml
index 2afa59c..6c22d84 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,3 @@
 [build-system]
-requires = ["setuptools >=44.0", "wheel >=0.37"]
-build-backend = "setuptools.build_meta"
+requires = ["setuptools >=44.0", "wheel >=0.37", "future"]
+build-backend = "setuptools.build_meta:__legacy__"