diff --git a/requirements.txt b/requirements.txt
index a01419a..0f6e846 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ nltk==3.3
 numpy==1.14.5
 pkg-resources==0.0.0
 progress==1.4
-protobuf==3.6.1
+protobuf==3.18.3
 requests==2.19.1
 six==1.11.0
 tensorboard==1.10.0