diff --git a/requirements.txt b/requirements.txt
index 8cfe279..4422c3d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ opencv-python==4.2.0.34
 Pillow==7.1.2
 pkg-resources==0.0.0
 portalocker==1.7.0
-protobuf==3.12.2
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pycocotools==2.0.0