diff --git a/requirements.txt b/requirements.txt
index bbf9642..21acb11 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -67,7 +67,7 @@ pickleshare==0.7.5
 Pillow==7.0.0
 prometheus-client==0.6.0
 prompt-toolkit==2.0.9
-protobuf==3.6.1
+protobuf==3.15.0
 ptyprocess==0.6.0
 py4j==0.10.7
 pybind11==2.3.0