diff --git a/requirements.txt b/requirements.txt
index 99d217d..9001f44 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ object-detection-0.1==0.1
 opencv-python==3.4.2.17
 opt-einsum==3.2.0
 Pillow==7.0.0
-protobuf==3.11.3
+protobuf==3.18.3
 pyparsing==2.4.6
 python-dateutil==2.8.1
 six==1.14.0