diff --git a/mlflow/requirements.txt b/mlflow/requirements.txt
index a2bdcf7b..f81bfb85 100644
--- a/mlflow/requirements.txt
+++ b/mlflow/requirements.txt
@@ -61,7 +61,7 @@ pexpect==4.8.0
 pickleshare==0.7.5
 prometheus-client==0.7.1
 prompt-toolkit==3.0.2
-protobuf==3.10.0
+protobuf==3.15.0
 psutil==5.6.5
 ptyprocess==0.6.0
 Pygments==2.5.1