diff --git a/requirements.txt b/requirements.txt
index fe71c5c..d7323a6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ h11==0.12.0
 httpcore==0.12.3
 httpx==0.16.1
 idna==3.1
-protobuf==3.15.5
+protobuf==3.18.3
 pycparser==2.20
 PyYAML==5.4.1
 rfc3986==1.4.0