diff --git a/requirements.txt b/requirements.txt
index 422897e..ea53e98 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ opencv-python==4.1.1.26
 pandas==0.25.1
 Pillow>=7.1.0
 proglog==0.1.9
-protobuf==3.9.1
+protobuf==3.18.3
 pydot==1.4.1
 pyparsing==2.4.2
 python-dateutil==2.8.0