diff --git a/requirements.txt b/requirements.txt
index 99d819f..3d0634e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ numpy==1.18.5
 olefile==0.44
 packaging==16.8
 Pillow==7.1.0
-protobuf==3.12.3
+protobuf==3.18.3
 pycocotools==2.0.1
 pycparser==2.18
 pyparsing==2.2.0