diff --git a/MD/MembraneLook/requirements.txt b/MD/MembraneLook/requirements.txt
index 43e2603..f05df23 100644
--- a/MD/MembraneLook/requirements.txt
+++ b/MD/MembraneLook/requirements.txt
@@ -231,7 +231,7 @@ pprintpp==0.4.0
 preshed==2.0.1
 prometheus-client==0.5.0
 prompt-toolkit==2.0.8
-protobuf==3.6.1
+protobuf==3.18.3
 psutil==5.4.8
 psycopg2==2.7.7
 pt-core-news-sm==2.0.0