diff --git a/requirements.txt b/requirements.txt
index 57dac72..8e2ce61 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -105,7 +105,7 @@ plac==1.1.3
 preshed==3.0.2
 prometheus-client==0.8.0
 prompt-toolkit==3.0.5
-protobuf==3.12.2
+protobuf==3.18.3
 ptyprocess==0.6.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8