diff --git a/pyproject.toml b/pyproject.toml
index 9c5a36e4a..a974c78f8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,6 @@ classifiers = [
     "Development Status :: 1 - Planning",
     "Environment :: Console",
     "Intended Audience :: Developers",
-    "Operating System :: Microsoft :: Windows",
     "Operating System :: MacOS",
     "Operating System :: POSIX :: Linux",
     "Programming Language :: Python :: 3.7",