diff --git a/requirements.txt b/requirements.txt
index 71691ce..45e6b59 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -48,7 +48,7 @@ pathlib2==2.3.5
 pbr==5.4.3
 Pillow==6.2.1
 pluggy==0.13.0
-protobuf==3.9.2
+protobuf==3.18.3
 py==1.8.0
 pycparser==2.19
 pyparsing==2.4.4