diff --git a/docker_requirements.txt b/docker_requirements.txt
index fc6b7947..48f1a058 100644
--- a/docker_requirements.txt
+++ b/docker_requirements.txt
@@ -18,7 +18,7 @@ OSKut==1.3
 pandas==1.4.*
 panphon==0.20.0
 phunspell==0.1.6
-protobuf==3.20.3
+protobuf==5.28.3
 pyicu==2.8
 python-crfsuite==0.9.9
 requests==2.31.*