diff --git a/annotator_models/requirements.txt b/annotator_models/requirements.txt
index 88bfea50..8a7365f8 100644
--- a/annotator_models/requirements.txt
+++ b/annotator_models/requirements.txt
@@ -60,7 +60,7 @@ ply==3.8
 proto-google-cloud-datastore-v1==0.90.4
 proto-google-cloud-error-reporting-v1beta1==0.15.3
 proto-google-cloud-logging-v2==0.91.3
-protobuf==3.18.3
+protobuf==5.29.6
 psutil==5.6.6
 pyasn1==0.4.2
 pyasn1-modules==0.2.1