diff --git a/exporter/opentelemetry-exporter-jaeger-proto-grpc/pyproject.toml b/exporter/opentelemetry-exporter-jaeger-proto-grpc/pyproject.toml
index 131f12a0b4a..7a0c628d366 100644
--- a/exporter/opentelemetry-exporter-jaeger-proto-grpc/pyproject.toml
+++ b/exporter/opentelemetry-exporter-jaeger-proto-grpc/pyproject.toml
@@ -26,6 +26,7 @@ classifiers = [
   "Typing :: Typed",
 ]
 dependencies = [
+  "protobuf ~= 3.20.0",
   "googleapis-common-protos ~= 1.52, < 1.60.0",
   "grpcio >= 1.0.0, < 2.0.0",
   "opentelemetry-api ~= 1.3",