diff --git a/pyproject.toml b/pyproject.toml
index 32c287303a..af00553f25 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -55,7 +55,7 @@ dependencies = [
   "opentelemetry-api>=1.27.0,<1.28",
   "opentelemetry-sdk>=1.27.0,<1.28",
   "opentelemetry-exporter-otlp-proto-http>=1.27.0,<1.28",
-  "protobuf>=4.21.1,<5.0",
+  "protobuf>=4.21.1,<6.0",
   "pulp-glue>=0.18.0,<0.30",
   "pygtrie>=2.5,<=2.5.0",
   "psycopg[binary]>=3.1.8,<=3.2.3",