diff --git a/requirements.txt b/requirements.txt
index 77150ab..6ed7971 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ numpy==1.18.2
 oauthlib==3.1.0
 olefile==0.46
 Pillow==8.3.2
-protobuf==3.11.3
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pycparser==2.20