diff --git a/requirements.txt b/requirements.txt
index 3ce5756..7a27f9d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,7 +21,7 @@ lazy-object-proxy==1.4.3
 MarkupSafe==1.1.1
 mccabe==0.6.1
 oauthlib==3.1.0
-protobuf==3.14.0
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.7
 pycparser==2.19