diff --git a/requirements.txt b/requirements.txt
index 0bd95ad..3568dc0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ msoffcrypto-tool==4.10.0
 oauthlib==3.0.1
 olefile==0.46
 oletools==0.54.2
-protobuf==3.7.0
+protobuf==3.18.3
 pyasn1==0.4.5
 pyasn1-modules==0.2.4
 pycparser==2.19