diff --git a/PP_APP/requirements.txt b/PP_APP/requirements.txt
index e546d03..9247392 100644
--- a/PP_APP/requirements.txt
+++ b/PP_APP/requirements.txt
@@ -45,7 +45,7 @@ numpy==1.18.2
 opencv-python==4.2.0.34
 Pillow==7.1.1
 progressbar2==3.51.3
-protobuf==3.11.3
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pylint==2.5.0