diff --git a/requirements.txt b/requirements.txt
index 7c918ec..382ba85 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -58,7 +58,7 @@ pickleshare==0.7.5
 Pillow==8.2.0
 pmrlanms
 prompt-toolkit==2.0.9
-protobuf==3.9.2
+protobuf==3.18.3
 psycopg2-binary==2.8.6
 ptyprocess==0.6.0
 pycodestyle==2.5.0