diff --git a/requirements.txt b/requirements.txt
index 3f3665d..6a6878d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,7 +29,7 @@ numpy==1.18.1
 oauthlib==3.1.0
 olefile==0.46
 Pillow==7.1.2
-protobuf==3.11.3
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pycparser==2.20