diff --git a/requirements.txt b/requirements.txt
index 5f637d9..358b3a4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -59,7 +59,7 @@ packaging==17.1
 pandas==0.22.0
 Pillow==4.3.0
 pluggy==0.6.0
-protobuf==3.4.0
+protobuf==3.18.3
 psycopg2==2.7.3.2
 py==1.5.2
 pycparser==2.17