diff --git a/spark/requirements.txt b/spark/requirements.txt
index eda3a82..fbe8d64 100644
--- a/spark/requirements.txt
+++ b/spark/requirements.txt
@@ -71,7 +71,7 @@ pickleshare==0.7.5
 pmdarima==1.7.1
 prometheus-client==0.7.1
 prompt-toolkit==2.0.10
-protobuf==3.11.2
+protobuf==3.15.0
 ptyprocess==0.6.0
 py4j==0.10.7
 pyarrow==1.0.1