diff --git a/requirements.txt b/requirements.txt
index 29568b1..8e659dd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -70,7 +70,7 @@ Pillow==7.1.1
 pkginfo==1.5.0.1
 prometheus-client==0.7.1
 prompt-toolkit==3.0.5
-protobuf==3.11.3
+protobuf==3.15.0
 ptyprocess==0.6.0
 pyaml==20.4.0
 pyasn1==0.4.8