diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 9c3aba2..79b386d
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ Markdown==3.1.1
 numpy==1.18.1
 pandas==0.25.3
 pkg-resources==0.0.0
-protobuf==3.11.2
+protobuf==3.18.3
 python-dateutil==2.8.1
 pytz==2019.3
 PyYAML==5.3