diff --git a/requirements.txt b/requirements.txt
index 38ca14a..6cfb8c8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -88,7 +88,7 @@ plac==0.9.6
 plotly==1.8.6
 polyglot==15.5.2
 preshed==1.0.0
-protobuf==3.4.0
+protobuf==3.18.3
 pyasn1==0.1.7
 pyasn1-modules==0.0.5
 PyBrain==0.3.3