diff --git a/requirements.txt b/requirements.txt
index a249984..bb20298 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -35,7 +35,7 @@ opt-einsum==3.1.0
 pandas==0.25.3
 pandas-datareader==0.8.1
 plotly==4.5.1
-protobuf==3.15.0
+protobuf==3.18.3
 py-trade-signal==1.0.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8