diff --git a/requirements.txt b/requirements.txt
index 8d6b8da..1edd98c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -85,7 +85,7 @@ plac==0.9.6
 preshed==2.0.1
 prometheus-client==0.7.1
 prompt-toolkit==2.0.9
-protobuf==3.8.0
+protobuf==3.18.3
 psutil==5.6.3
 pyaml==19.4.1
 pyasn1==0.4.7