diff --git a/requirements.txt b/requirements.txt
index ee11b74..c8e6f3f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ opt-einsum==3.2.1
 Pillow==7.1.2
 plac==1.1.3
 preshed==3.0.2
-protobuf==3.11.3
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pycparser==2.20