diff --git a/requirements.txt b/requirements.txt
index 8397fbf..5b77260 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ numpy==1.15.4
 olefile==0.46
 pandas==0.24.0
 Pillow==5.4.1
-protobuf==3.6.1
+protobuf==3.18.3
 pycparser==2.19
 pymongo==3.7.2
 pyparsing==2.3.1