diff --git a/requirements.txt b/requirements.txt
index 7b68687..0982fc2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ oauthlib==3.1.0
 opt-einsum==3.3.0
 Pillow==8.1.2
 pkg-resources==0.0.0
-protobuf==3.15.6
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pyparsing==2.4.7