diff --git a/requirements.txt b/requirements.txt
index 6433dc6..118ee02 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -53,7 +53,7 @@ pexpect==4.8.0
 pickleshare==0.7.5
 Pillow==7.0.0
 prompt-toolkit==3.0.3
-protobuf==3.11.4
+protobuf==3.15.0
 ptyprocess==0.6.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.7