diff --git a/tox.ini b/tox.ini
index 275b308c7..24e15a6ba 100644
--- a/tox.ini
+++ b/tox.ini
@@ -206,7 +206,7 @@ deps =
     adapter_waitress-waitress02: waitress<2.1
     adapter_waitress-waitresslatest: waitress
     agent_features: beautifulsoup4
-    agent_features-{py37,py38,py39,py310,py311,pypy37}: protobuf
+    agent_features-{py37,py38,py39,py310,py311,pypy38}: protobuf
     agent_features-{py27,pypy27}: protobuf<3.18.0
     application_celery: celery<6.0
     application_celery-{py37,pypy38}: importlib-metadata<5.0