diff --git a/requirements.txt b/requirements.txt
index ae377c9..1b17f87 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ opt-einsum==3.3.0
 packaging==20.4
 Pillow==9.0.0
 pluggy==0.13.1
-protobuf==3.15.0
+protobuf==3.18.3
 py==1.10.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8