diff --git a/pyproject.toml b/pyproject.toml
index 3405923..c9b2e10 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ slipcover = "slipcover.__main__:main"
 requires = [
     "setuptools>61",
     "wheel",
-    "pip; python_version < '3.11'" # for tomllib
+    "tomli; python_version < '3.11'" # tomllib alternative
 ]
 build-backend = "setuptools.build_meta"
 
diff --git a/setup.py b/setup.py
index 4f0e107..7105b33 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@
 try:
     import tomllib  # available in Python 3.11+
 except ImportError:
-    from pip._vendor import tomli as tomllib
+    import tomli as tomllib
 
 
 PYTHON_VERSION = sys.version_info[0:2]