diff --git a/requirements.txt b/requirements.txt
index 5f337bd..ae34ade 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ kiwisolver==1.2.0; python_version >= '3.6'
 krpc==0.4.8
 matplotlib
 numpy==1.18.5
-protobuf==3.12.2
+protobuf==3.18.3
 pyparsing==2.4.7; python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'
 python-dateutil==2.8.1; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
 six==1.15.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'