diff --git a/setup.py b/setup.py
index 8836040b..15e28440 100644
--- a/setup.py
+++ b/setup.py
@@ -18,9 +18,6 @@
     "Intended Audience :: Science/Research",
     "Natural Language :: English",
     "License :: OSI Approved :: MIT License",
-    "Operating System :: Unix",
-    "Operating System :: MacOS",
-    "Operating System :: Windows",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3.6",
     "Programming Language :: Python :: 3.7",