diff --git a/setup.py b/setup.py
index 0e313d59..17a6372d 100644
--- a/setup.py
+++ b/setup.py
@@ -62,7 +62,6 @@
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
-        "Programming Language :: Python :: Implementation :: PyPy3",
         "Topic :: Internet :: WWW/HTTP",
     ],
     keywords="web forms form generation schema validation deform",