diff --git a/requirements.txt b/requirements.txt
index 4ba8153..016e1e8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ mysql-connector-python==8.0.19
 nose==1.3.7
 paramiko==2.7.1
 prettytable==0.7.2
-protobuf==3.6.1
+protobuf==3.18.3
 pyasn1==0.4.8
 pycparser==2.19
 PyNaCl==1.3.0