diff --git a/examples/requirements.txt b/examples/requirements.txt
index cd00bfa..1655833 100644
--- a/examples/requirements.txt
+++ b/examples/requirements.txt
@@ -9,7 +9,7 @@ lazy-object-proxy==1.6.0
 mccabe==0.6.1
 numpy==1.20.3
 pandas==1.2.4
-protobuf==3.17.2
+protobuf==3.18.3
 pyarrow==4.0.1
 pycodestyle==2.7.0
 pylint==2.8.3