diff --git a/setup.py b/setup.py
index abe06552b..1d68bf87b 100644
--- a/setup.py
+++ b/setup.py
@@ -42,6 +42,7 @@
     "google-api-core[grpc] >= 1.34.0, <3.0.0dev,!=2.0.*,!=2.1.*,!=2.2.*,!=2.3.*,!=2.4.*,!=2.5.*,!=2.6.*,!=2.7.*,!=2.8.*,!=2.9.*,!=2.10.*",
     "proto-plus >= 1.22.0, <2.0.0dev",
     "proto-plus >= 1.22.2, <2.0.0dev; python_version>='3.11'",
+    "proto-plus >= 1.25.0, < 2.0.0dev; python_version >= '3.13'",
     "protobuf>=3.20.2,<6.0.0dev,!=4.21.0,!=4.21.1,!=4.21.2,!=4.21.3,!=4.21.4,!=4.21.5",
     "grpc-google-iam-v1 >= 0.12.4, < 1.0.0dev",
     "grpcio-status >= 1.33.2",