diff --git a/implementation/requirements.txt b/implementation/requirements.txt
index 9a65906..f17f228 100644
--- a/implementation/requirements.txt
+++ b/implementation/requirements.txt
@@ -26,7 +26,7 @@ pandas==0.25.1
 pandas-datareader==0.8.1
 parsimonious==0.8.1
 pprint==0.1
-protobuf==3.10.0
+protobuf==3.15.0
 pycryptodome==3.9.0
 pyrsistent==0.15.4
 python-dateutil==2.8.0