diff --git a/requirements.txt b/requirements.txt
index 61f2f2c..9dcc172 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -39,7 +39,7 @@ opencv-python==4.2.0.32
 opt-einsum==3.3.0
 packaging==19.2
 Pillow==8.2.0
-protobuf==3.15.3
+protobuf==3.18.3
 psycopg2-binary==2.8.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8