diff --git a/requirements.txt b/requirements.txt
index 168549a..a6692b2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ idna==2.10
 keyring==17.1.1
 keyrings.alt==3.1.1
 mock==4.0.2
-protobuf==3.12.2
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pycrypto==2.6.1