diff --git a/requirements.txt b/requirements.txt
index e3271ef..aa260ea 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -68,7 +68,7 @@ pickleshare==0.7.5
 pluggy==0.13.1
 prometheus-client==0.7.1
 prompt-toolkit==2.0.10
-protobuf==3.11.2
+protobuf==3.15.0
 ptyprocess==0.6.0
 py==1.8.0
 pyasn1==0.4.8