diff --git a/requirements.txt b/requirements.txt
index aa1bf23..1a1045b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,7 +29,7 @@ pandas==0.25.1
 Pillow==6.2.2
 plac==0.9.6
 preshed==2.0.1
-protobuf==3.9.1
+protobuf==3.18.3
 pycurl==7.43.0
 pygobject==3.20.0
 pyparsing==2.4.2