diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 55438bd..d7ba95c
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ mock==3.0.5
 nltk==3.4.1
 numpy==1.16.3
 Pillow==6.0.0
-protobuf==3.7.1
+protobuf==3.18.3
 python-dateutil==2.8.0
 PyYAML==5.1
 requests==2.22.0