diff --git a/requirements.txt b/requirements.txt
index c239c62..6e38888 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ mccabe==0.6.1
 mysql-connector-python==8.0.23
 prettytable==2.1.0
 prompt-toolkit==3.0.16
-protobuf==3.15.5
+protobuf==3.15.6
 pycodestyle==2.6.0
 Pygments==2.8.1
 pylint==2.7.2