diff --git a/requirements.txt b/requirements.txt
index 807f01c..3b95b61 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ itsdangerous==1.1.0
 Jinja2==2.10.1
 jwcrypto==0.6.0
 MarkupSafe==1.1.1
-protobuf==3.8.0
+protobuf==3.18.3
 pyasn1==0.4.5
 pyasn1-modules==0.2.5
 pycparser==2.19