diff --git a/requirements.txt b/requirements.txt
index db25035..2c11399 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ Keras-Preprocessing==1.0.5
 Markdown==3.2.2
 MarkupSafe==1.1.1
 numpy==1.18.5
-protobuf==3.13.0
+protobuf==3.18.3
 pyasn1==0.4.4
 pyasn1-modules==0.2.2
 pytz==2018.5