diff --git a/setup.py b/setup.py
index 9bcaeb38..80be5d54 100644
--- a/setup.py
+++ b/setup.py
@@ -44,6 +44,8 @@
     "google-api-core[grpc] >= 1.33.2, <3.0.0dev,!=2.0.*,!=2.1.*,!=2.2.*,!=2.3.*,!=2.4.*,!=2.5.*,!=2.6.*,!=2.7.*",
     "proto-plus >= 1.22.3, < 2.0.0dev",
     "proto-plus >= 1.25.0, < 2.0.0dev; python_version >= '3.13'",
+    "proto-plus >= 1.22.3, < 2.0.0dev",
+    "proto-plus >= 1.25.0, < 2.0.0dev; python_version >= '3.13'",
 ]
 url = "https://github.com/googleapis/python-pubsublite"