diff --git a/requirements.txt b/requirements.txt
index d9e5c5f..3d7d735 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,7 +34,7 @@ opencv-python==4.3.0.36
 opt-einsum==3.3.0
 pickleshare==0.7.5
 Pillow==7.2.0
-protobuf==3.12.2
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pyparsing==2.4.7