diff --git a/e2e-test-server/constraints.txt b/e2e-test-server/constraints.txt
index 43589a85..8a5c6642 100644
--- a/e2e-test-server/constraints.txt
+++ b/e2e-test-server/constraints.txt
@@ -28,7 +28,7 @@ opentelemetry-sdk==1.30.0
 opentelemetry-semantic-conventions==0.51b0
 packaging==24.1
 proto-plus==1.22.3
-protobuf==4.24.4
+protobuf==5.29.6
 pyasn1==0.5.0
 pyasn1-modules==0.3.0
 pydantic==2.4.2