diff --git a/requirements.txt b/requirements.txt
index 2cbba62..e3974d9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ certifi==2018.1.18
 chardet==3.0.4
 colorama==0.3.9
 idna==2.6
-protobuf==3.5.2.post1
+protobuf==3.18.3
 pycryptodome==3.5.1
 PyQt5==5.10.1
 requests==2.18.4