diff --git a/requirements_freeze.txt b/requirements_freeze.txt
index 95ed482..ba39251 100644
--- a/requirements_freeze.txt
+++ b/requirements_freeze.txt
@@ -53,7 +53,7 @@ Pillow==7.1.2
 portpicker==1.2.0
 prometheus-client==0.8.0
 prompt-toolkit==1.0.18
-protobuf==3.12.2
+protobuf==3.18.3
 ptyprocess==0.6.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8